util: Delete the execfile m5 utility command.

This command was just a thin wrapper around the readfile command, and
can be easily duplicated by piping the output of that command to
/tmp/execfile and then running it.

Change-Id: Ib77166ee9f07571d57e4d21e9615def55e5391a8
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27233
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
1 file changed