Removed Webpacker files

Author: akhilgkrishnan

railties/test/generators/app_generator_test.rb

@@ -739,19 +739,19 @@ def test_skip_javascript_option
   def test_webpack_option
     generator([destination_root], javascript: "webpack")
 
-    webpacker_called = 0
+    webpack_called = 0
     command_check = -> command, *_ do
       case command
       when "javascript:install:webpack"
-        webpacker_called += 1
+        webpack_called += 1
       end
     end
 
     generator.stub(:rails_command, command_check) do
       run_generator_instance
     end
 
-    assert_equal 1, webpacker_called, "`javascript:install:webpack` expected to be called once, but was called #{webpacker_called} times."
+    assert_equal 1, webpack_called, "`javascript:install:webpack` expected to be called once, but was called #{webpack_called} times."
     assert_gem "jsbundling-rails"
     assert_node_files
   end

railties/test/isolation/assets/config/webpack/base.js

@@ -4,7 +4,6 @@
   "dependencies": {
     "@rails/actioncable": "file:../../../../actioncable",
     "@rails/activestorage": "file:../../../../activestorage",
-    "@rails/ujs": "file:../../../../actionview",
-    "@rails/webpacker": "^6.0.0-rc.5"
+    "@rails/ujs": "file:../../../../actionview"
   }
 }