Remove unsupported LTSs

Author: Porges

.github/workflows/on-push.yml

@@ -25,8 +25,6 @@ jobs:
       fail-fast: false
       matrix:
         resolver:
-        - 'lts-10'
-        - 'lts-11'
         - 'lts-12'
         - 'lts-13'
         - 'lts-14'