Remove add-to-app Xcode build phase input files (flutter#69846)

Author: jmagman

packages/flutter_tools/templates/module/ios/library/Flutter.tmpl/podhelper.rb.tmpl

@@ -118,12 +118,6 @@ def install_flutter_application_pod(flutter_application_path)
   flutter_export_environment_path = File.join('${SRCROOT}', relative, 'flutter_export_environment.sh');
   script_phase :name => 'Run Flutter Build {{projectName}} Script',
     :script => "set -e\nset -u\nsource \"#{flutter_export_environment_path}\"\n\"$FLUTTER_ROOT\"/packages/flutter_tools/bin/xcode_backend.sh build",
-    :input_files => [
-      File.join('${SRCROOT}', flutter_application_path, '.metadata'),
-      File.join('${SRCROOT}', relative, 'App.framework', 'App'),
-      File.join('${SRCROOT}', relative, 'engine', 'Flutter.framework', 'Flutter'),
-      flutter_export_environment_path
-    ],
     :execution_position => :before_compile
 end