[file_packager] Remove support for legacy locateFilePackage (#22827)

This old name was removed back in 2014 (bdfa7bc)

tools/file_packager.py

@@ -768,10 +768,6 @@ def generate_js(data_target, data_files, metadata):
       }
       var PACKAGE_NAME = '%s';
       var REMOTE_PACKAGE_BASE = '%s';
-      if (typeof Module['locateFilePackage'] === 'function' && !Module['locateFile']) {
-        Module['locateFile'] = Module['locateFilePackage'];
-        err('warning: you defined Module.locateFilePackage, that has been renamed to Module.locateFile (using your locateFilePackage for now)');
-      }
       var REMOTE_PACKAGE_NAME = Module['locateFile'] ? Module['locateFile'](REMOTE_PACKAGE_BASE, '') : REMOTE_PACKAGE_BASE;\n''' % (js_manipulation.escape_for_js_string(data_target), js_manipulation.escape_for_js_string(remote_package_name))
     metadata['remote_package_size'] = remote_package_size
     ret += '''var REMOTE_PACKAGE_SIZE = metadata['remote_package_size'];\n'''