Fix warnings

ruby/lib/minitest/queue/runner.rb

@@ -223,7 +223,7 @@ def bisect_command
 
         failing_order = queue.candidates
         step("Final validation")
-        status = if run_tests_in_fork(failing_order)
+        if run_tests_in_fork(failing_order)
           step(yellow("The bisection was inconclusive, there might not be any leaky test here."))
           File.write('log/test_order.log', "")
           exit! 1
@@ -314,7 +314,8 @@ def report_grind_command
       private
 
       attr_reader :queue_config, :options, :command, :argv
-      attr_accessor :queue, :queue_url, :grind_list, :grind_count, :load_paths, :verbose
+      attr_writer :queue_url
+      attr_accessor :queue, :grind_list, :grind_count, :load_paths, :verbose
 
       def require_worker_id!
         if queue.distributed?

ruby/test/integration/minitest_redis_test.rb

@@ -216,7 +216,6 @@ def test_max_test_failed
       assert_equal 'Ran 47 tests, 47 assertions, 3 failures, 0 errors, 0 skips, 44 requeues in X.XXs', output
 
       # Run the reporter
-      exit_code = nil
       out, err = capture_subprocess_io do
         system(
           @exe, 'report',
@@ -862,12 +861,6 @@ def test_redis_reporter
           )
         end
 
-        warning = <<~END
-          [WARNING] Atest#test_bar was picked up by another worker because it didn't complete in the allocated 2 seconds.
-          You may want to either optimize this test or bump ci-queue timeout.
-          It's also possible that the worker that was processing it was terminated without being able to report back.
-        END
-
         warnings_file.rewind
         content = JSON.parse(warnings_file.read)
         assert_equal 1, content.size
@@ -953,7 +946,7 @@ def test_application_error
 
       assert_equal 42, $?.exitstatus
 
-      out, err = capture_subprocess_io do
+      out, _ = capture_subprocess_io do
         system(
           @exe, 'report',
           '--queue', @redis_url,