Revert "LAKITU: Set EGIT_MASTER=main for some llvm packages"

This reverts commit eebb188560d1fc2ca21d2554965e28552a32c14d.

Reason for revert: This change is not needed when using git-r3.eclass

BUG=b/195995730
TEST=presubmit
RELEASE_NOTE=None

Change-Id: I7e3f4cb825d9cd1975a550cb231e07c42469ab0a
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/chromiumos-overlay/+/20796
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Dexter Rivera <riverade@google.com>
3 files changed