Merge pull request #25528 from Gaurav2728/test_may_not_using_these_files

client test have not using Pathname and hashwithindifferent access

actioncable/test/client_test.rb

 require 'test_helper'
 require 'concurrent'
 
-require 'active_support/core_ext/hash/indifferent_access'
-require 'pathname'
-
 require 'faye/websocket'
 require 'json'