Remove 2.14 from supported_release_branches - no longer needed.

Author: ggainey

template_config.yml

@@ -102,7 +102,6 @@ stalebot_days_until_close: 30
 stalebot_days_until_stale: 90
 stalebot_limit_to_pulls: true
 supported_release_branches:
-- '2.14'
 - '2.15'
 - '2.16'
 - '2.19'