scons,systemc: Drop the check for gcc version when building systemc.

The minimum version of gcc is 5, and the check would only fail if gcc
was older than that.

Change-Id: I20f4f42661baf415b7cbe80ec0ace4e427666348
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/41595
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
1 file changed