kconfig: remove unused TASK_DEBUG options

Change-Id: I19731bd0148aed6916844f7abf6eacc7fe4e5e2c
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
diff --git a/misc/Kconfig b/misc/Kconfig
index ab3af62..8637fd7 100644
--- a/misc/Kconfig
+++ b/misc/Kconfig
@@ -134,15 +134,6 @@
 	only disables optimization, more debugging variants can be selected
 	from here to allow more debugging.
 
-config TASK_DEBUG
-	bool
-	prompt "Task debugging [EXPERIMENTAL]"
-	default n
-	help
-	This option allows execution of all tasks (with the exception of
-	essential system tasks) to be suspended so that debugging operations
-	can be performed.
-
 config STACK_USAGE
 	bool "Generate stack usage information"
 	default n