Remove 12.1 stable branches

No longer needed

Change-Id: I143893acecbeb2450a4f509a3940e85e9214ee32
6 files changed
tree: 49c3a7e4f9018777714bed3c56928713851e98f2
  1. config/
  2. .gitreview
  3. crowdin_sync.py
  4. README.mkdn