llvm_tools: remove REMOVE_PATCHES failure mode

This failure mode seems completely unused, and the concept of removing
all patches before a certain rev (but only if any patches fail) is kind
of odd. Instead, we should just have a cronjob that ensures this is done
regularly.

BUG=b:332589934
TEST=repo upload

Change-Id: Idc25ad61031f70ceb717b8a35219b521a820b6c8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/5420772
Reviewed-by: Jordan Abrahams-Whitehead <ajordanr@google.com>
Tested-by: George Burgess <gbiv@chromium.org>
Commit-Queue: George Burgess <gbiv@chromium.org>
5 files changed