Simplify the patch creation helper script by removing support for automatic conversion to Mercurial's patch format. We no longer use Mercurial as a primary repository, so this support is not likely to be needed again. Change-Id: I83f6efb9ccaee9c548b33257a4d6128153750c76 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5162 Reviewed-by: Gabe Black <gabeblack@google.com>