config: Remove 5.15 kernel entries in overlay bashrc

BUG=b:162525571
TEST=emerge-betty chromeos-kernel-5_15

Cq-Depend: chromium:3450401
Change-Id: Iea919fd1c7f5596e4bb2495676008c8d3fb86168
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/3456646
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Chun-Tse Shao <ctshao@google.com>
Commit-Queue: Chun-Tse Shao <ctshao@google.com>
Auto-Submit: Chun-Tse Shao <ctshao@google.com>
2 files changed