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>
2 files changed