drop ruby 3.0 from matrix tests

Author: schoblaska

.github/workflows/ci.yml

@@ -8,9 +8,6 @@ jobs:
     strategy:
       matrix:
         ruby:
-          # See comment comes from https://github.com/ruby/setup-ruby#matrix-of-ruby-versions
-          # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
-          - "3.0"
           - 3.1
           - 3.2
           - 3.3