Remove testing for EOL Rubies 3.1 + 3.0

Author: radar

.github/workflows/ruby.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby_version: [head, 3.4, 3.3, 3.2, 3.1, '3.0', jruby]
+        ruby_version: [head, 3.4, 3.3, 3.2, jruby]
         gemfile:
           - Gemfile
           - gemfiles/Gemfile.rails-7.0.x
@@ -26,18 +26,6 @@ jobs:
           - gemfiles/Gemfile.rails-8.0.x
           - gemfiles/Gemfile.rails-main
         exclude:
-          # Rails 8+ requires at least Ruby 3.2
-          - ruby_version: '3.1'
-            gemfile: gemfiles/Gemfile.rails-main
-          - ruby_version: '3.0'
-            gemfile: gemfiles/Gemfile.rails-main
-          - ruby_version: '3.1'
-            gemfile: gemfiles/Gemfile.rails-8.0.x
-          - ruby_version: '3.0'
-            gemfile: gemfiles/Gemfile.rails-8.0.x
-          # Rails 7.2.x requires at least Ruby 3.1
-          - ruby_version: '3.0'
-            gemfile: gemfiles/Gemfile.rails-7.2.x
           # JRuby is not supported by Rails 7.0.x
           - ruby_version: jruby
             gemfile: gemfiles/Gemfile.rails-7.0.x