tests: remove testing for board unit_testing

Remove boilerplate code:
> if (NOT BOARD STREQUAL unit_testing)
>    message(FATAL_ERROR "This project can only be used with...")
> endif()

as that is now handled by boards.cmake when validating the board.

Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
diff --git a/tests/bluetooth/controller/ctrl_api/CMakeLists.txt b/tests/bluetooth/controller/ctrl_api/CMakeLists.txt
index 2a04ef6..0aa11e2 100644
--- a/tests/bluetooth/controller/ctrl_api/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_api/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_chmu/CMakeLists.txt b/tests/bluetooth/controller/ctrl_chmu/CMakeLists.txt
index 253f737..72c82c1 100644
--- a/tests/bluetooth/controller/ctrl_chmu/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_chmu/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_cis_create/CMakeLists.txt b/tests/bluetooth/controller/ctrl_cis_create/CMakeLists.txt
index cf25ce4..17bf27b 100644
--- a/tests/bluetooth/controller/ctrl_cis_create/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_cis_create/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.13.1)
 
-if (NOT BOARD STREQUAL unit_testing)
-	message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
 	src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_cis_terminate/CMakeLists.txt b/tests/bluetooth/controller/ctrl_cis_terminate/CMakeLists.txt
index 0bc561e..c512dda 100644
--- a/tests/bluetooth/controller/ctrl_cis_terminate/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_cis_terminate/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.13.1)
 
-if (NOT BOARD STREQUAL unit_testing)
-	message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
 	src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_collision/CMakeLists.txt b/tests/bluetooth/controller/ctrl_collision/CMakeLists.txt
index 3611d57..dc56c6c 100644
--- a/tests/bluetooth/controller/ctrl_collision/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_collision/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_conn_update/CMakeLists.txt b/tests/bluetooth/controller/ctrl_conn_update/CMakeLists.txt
index 253f737..72c82c1 100644
--- a/tests/bluetooth/controller/ctrl_conn_update/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_conn_update/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_cte_req/CMakeLists.txt b/tests/bluetooth/controller/ctrl_cte_req/CMakeLists.txt
index 443f65e..691f726 100644
--- a/tests/bluetooth/controller/ctrl_cte_req/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_cte_req/CMakeLists.txt
@@ -5,10 +5,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_data_length_update/CMakeLists.txt b/tests/bluetooth/controller/ctrl_data_length_update/CMakeLists.txt
index c97e69b..bc276fc 100644
--- a/tests/bluetooth/controller/ctrl_data_length_update/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_data_length_update/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_encrypt/CMakeLists.txt b/tests/bluetooth/controller/ctrl_encrypt/CMakeLists.txt
index 8f3f284..67eabf2 100644
--- a/tests/bluetooth/controller/ctrl_encrypt/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_encrypt/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_feature_exchange/CMakeLists.txt b/tests/bluetooth/controller/ctrl_feature_exchange/CMakeLists.txt
index 45bae44..b825622 100644
--- a/tests/bluetooth/controller/ctrl_feature_exchange/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_feature_exchange/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_hci/CMakeLists.txt b/tests/bluetooth/controller/ctrl_hci/CMakeLists.txt
index 45bae44..b825622 100644
--- a/tests/bluetooth/controller/ctrl_hci/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_hci/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_invalid/CMakeLists.txt b/tests/bluetooth/controller/ctrl_invalid/CMakeLists.txt
index 2fb4874..18b6975 100644
--- a/tests/bluetooth/controller/ctrl_invalid/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_invalid/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_le_ping/CMakeLists.txt b/tests/bluetooth/controller/ctrl_le_ping/CMakeLists.txt
index 77eb0b9..86bf96a 100644
--- a/tests/bluetooth/controller/ctrl_le_ping/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_le_ping/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_min_used_chans/CMakeLists.txt b/tests/bluetooth/controller/ctrl_min_used_chans/CMakeLists.txt
index af9e191..c11aae3 100644
--- a/tests/bluetooth/controller/ctrl_min_used_chans/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_min_used_chans/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-	message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
 	src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_phy_update/CMakeLists.txt b/tests/bluetooth/controller/ctrl_phy_update/CMakeLists.txt
index 0b31cd7..007d4575 100644
--- a/tests/bluetooth/controller/ctrl_phy_update/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_phy_update/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_terminate/CMakeLists.txt b/tests/bluetooth/controller/ctrl_terminate/CMakeLists.txt
index c423eac..b0f5361 100644
--- a/tests/bluetooth/controller/ctrl_terminate/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_terminate/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-	message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
 	src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_tx_buffer_alloc/CMakeLists.txt b/tests/bluetooth/controller/ctrl_tx_buffer_alloc/CMakeLists.txt
index cbfaaf4..762bafb 100644
--- a/tests/bluetooth/controller/ctrl_tx_buffer_alloc/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_tx_buffer_alloc/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_tx_queue/CMakeLists.txt b/tests/bluetooth/controller/ctrl_tx_queue/CMakeLists.txt
index 6639d0d..334ed79 100644
--- a/tests/bluetooth/controller/ctrl_tx_queue/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_tx_queue/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_unsupported/CMakeLists.txt b/tests/bluetooth/controller/ctrl_unsupported/CMakeLists.txt
index aefd4f5..4dc8100 100644
--- a/tests/bluetooth/controller/ctrl_unsupported/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_unsupported/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )
diff --git a/tests/bluetooth/controller/ctrl_version/CMakeLists.txt b/tests/bluetooth/controller/ctrl_version/CMakeLists.txt
index 68c71bc..7c2fd01 100644
--- a/tests/bluetooth/controller/ctrl_version/CMakeLists.txt
+++ b/tests/bluetooth/controller/ctrl_version/CMakeLists.txt
@@ -2,10 +2,6 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 
-if (NOT BOARD STREQUAL unit_testing)
-  message(FATAL_ERROR "This project can only be used with '-DBOARD=unit_testing'.")
-endif()
-
 FILE(GLOB SOURCES
   src/*.c
 )