Remove unused i18n shim

Change-Id: I3fa71465277a3119c5deca86668a0128ac78caba

Gadgets.i18n.php

@@ -1,35 +0,0 @@
-<?php
-/**
- * This is a backwards-compatibility shim, generated by:
- * https://git.wikimedia.org/blob/mediawiki%2Fcore.git/HEAD/maintenance%2FgenerateJsonI18n.php
- *
- * Beginning with MediaWiki 1.23, translation strings are stored in json files,
- * and the EXTENSION.i18n.php file only exists to provide compatibility with
- * older releases of MediaWiki. For more information about this migration, see:
- * https://www.mediawiki.org/wiki/Requests_for_comment/Localisation_format
- *
- * This shim maintains compatibility back to MediaWiki 1.17.
- */
-$messages = array();
-if ( !function_exists( 'wfJsonI18nShimf270916adbc2d102' ) ) {
-	function wfJsonI18nShimf270916adbc2d102( $cache, $code, &$cachedData ) {
-		$codeSequence = array_merge( array( $code ), $cachedData['fallbackSequence'] );
-		foreach ( $codeSequence as $csCode ) {
-			$fileName = dirname( __FILE__ ) . "/i18n/$csCode.json";
-			if ( is_readable( $fileName ) ) {
-				$data = FormatJson::decode( file_get_contents( $fileName ), true );
-				foreach ( array_keys( $data ) as $key ) {
-					if ( $key === '' || $key[0] === '@' ) {
-						unset( $data[$key] );
-					}
-				}
-				$cachedData['messages'] = array_merge( $data, $cachedData['messages'] );
-			}
-
-			$cachedData['deps'][] = new FileDependency( $fileName );
-		}
-		return true;
-	}
-
-	$GLOBALS['wgHooks']['LocalisationCacheRecache'][] = 'wfJsonI18nShimf270916adbc2d102';
-}

extension.json

@@ -24,7 +24,6 @@
 		]
 	},
 	"ExtensionMessagesFiles": {
-		"Gadgets": "Gadgets.i18n.php",
 		"GadgetsAlias": "Gadgets.alias.php"
 	},
 	"AutoloadClasses": {