Drop old rubies

Author: pirj

.github/workflows/ci.yml

@@ -1,4 +1,4 @@
-# This file was generated on 2020-11-22T07:41:13+00:00 from the rspec-dev repo.
+# This file was generated on 2020-12-07T01:07:10+03:00 from the rspec-dev repo.
 # DO NOT modify it by hand as your changes will get lost the next time it is generated.
 
 name: RSpec CI
@@ -26,8 +26,6 @@ jobs:
           - 2.5
           - 2.4
           - 2.3
-          - 2.2
-          - 2.1.9
           - ruby-head
         env:
           -
@@ -74,8 +72,6 @@ jobs:
           - 2.5
           - 2.4
           - 2.3
-          - 2.2
-          - 2.1.9
       fail-fast: false
     steps:
       - uses: actions/checkout@v2