Make Lint/RedundantRequireStatement mark set as a redundant require i…

…n Ruby 3.2+

changelog/new_add_set_to_redundant_require_statement.md

@@ -0,0 +1 @@
+* [#11126](https://github.com/rubocop/rubocop/pull/11126): Have `Lint/RedundantRequireStatement` mark `set` as a redundant require in Ruby 3.2+. ([@drenmi][])

lib/rubocop/cop/lint/redundant_require_statement.rb

@@ -20,6 +20,7 @@ module Lint
       #   * 2.5+ ... Add `pp` above
       #   * 2.7+ ... Add `ruby2_keywords` above
       #   * 3.1+ ... Add `fiber` above
+      #   * 3.2+ ... `set`
       #
       # This cop target those features.
       #
@@ -63,7 +64,8 @@ def redundant_feature?(feature_name)
             (target_ruby_version >= 2.2 && RUBY_22_LOADED_FEATURES.include?(feature_name)) ||
             (target_ruby_version >= 2.5 && feature_name == 'pp') ||
             (target_ruby_version >= 2.7 && feature_name == 'ruby2_keywords') ||
-            (target_ruby_version >= 3.1 && feature_name == 'fiber')
+            (target_ruby_version >= 3.1 && feature_name == 'fiber') ||
+            (target_ruby_version >= 3.2 && feature_name == 'set')
         end
         # rubocop:enable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity
       end

spec/rubocop/cop/lint/redundant_require_statement_spec.rb

@@ -160,5 +160,19 @@
         require 'uri'
       RUBY
     end
+
+    context 'target ruby version >= 3.2', :ruby32 do
+      it 'registers an offense and corrects when using requiring `set`' do
+        expect_offense(<<~RUBY)
+          require 'set'
+          ^^^^^^^^^^^^^ Remove unnecessary `require` statement.
+          require 'uri'
+        RUBY
+
+        expect_correction(<<~RUBY)
+          require 'uri'
+        RUBY
+      end
+    end
   end
 end