RUBY-3983 Enable Lint/UnreachableLoop cop

.rubocop_todo.yml

@@ -61,14 +61,6 @@ Lint/UnreachableCode:
     - 'lib/mongo/protocol/serializers.rb'
     - 'spec/runners/unified/test.rb'
 
-# Offense count: 2
-# Configuration parameters: AllowedPatterns.
-# AllowedPatterns: (?-mix:(exactly|at_least|at_most)\(\d+\)\.times)
-Lint/UnreachableLoop:
-  Exclude:
-    - 'spec/integration/query_cache_spec.rb'
-    - 'spec/mongo/cursor_spec.rb'
-
 # Offense count: 5
 # This cop supports safe autocorrection (--autocorrect).
 # Configuration parameters: AllowUnusedKeywordArguments, IgnoreEmptyMethods, IgnoreNotImplementedMethods, NotImplementedExceptions.

spec/integration/query_cache_spec.rb

@@ -1190,7 +1190,7 @@
     context 'using each & break' do
       let(:partial_first_iteration) do
         called = false
-        authorized_collection.find.each do
+        authorized_collection.find.each do # rubocop:disable Lint/UnreachableLoop -- iterate a single document
           called = true
           break
         end

spec/mongo/cursor_spec.rb

@@ -656,7 +656,7 @@
 
       context 'after #each was called once' do
         before do
-          cursor.each do |_doc|
+          cursor.each do |_doc| # rubocop:disable Lint/UnreachableLoop -- partially iterate on purpose
             break
           end
         end