soc: arc: snps_nsim: delete C file with no code

soc_config.c for snps_nsim had no actual code, just a bunch of includes.
Deleting as it has no value (and triggered a compliance warning because
file had no newline at EOF).

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
diff --git a/soc/arc/snps_nsim/CMakeLists.txt b/soc/arc/snps_nsim/CMakeLists.txt
index 7dda794..f428d83 100644
--- a/soc/arc/snps_nsim/CMakeLists.txt
+++ b/soc/arc/snps_nsim/CMakeLists.txt
@@ -53,7 +53,4 @@
   zephyr_ld_option_ifdef(CONFIG_SOC_NSIM_HS_MPUV6 -Hlib=hs38_full)
 endif()
 
-zephyr_sources(
-  soc.c
-  soc_config.c
-  )
+zephyr_sources(soc.c)
diff --git a/soc/arc/snps_nsim/soc_config.c b/soc/arc/snps_nsim/soc_config.c
deleted file mode 100644
index f9a9da1..0000000
--- a/soc/arc/snps_nsim/soc_config.c
+++ /dev/null
@@ -1,9 +0,0 @@
-/*
- * Copyright (c) 2018 Synopsys, Inc. All rights reserved.
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
-#include <zephyr/device.h>
-#include <zephyr/init.h>
-#include "soc.h"
\ No newline at end of file