diff --git a/src/client/init.ts b/src/client/init.ts
index 12bb0d58c1..d1c408bb77 100644
--- a/src/client/init.ts
+++ b/src/client/init.ts
@@ -34,18 +34,6 @@ console.info(`Misskey v${version}`);
 window.onerror = null;
 window.onunhandledrejection = null;
 
-// 後方互換性のため。
-// TODO: そのうち消す
-if ((typeof ColdDeviceStorage.get('lightTheme') === 'string') || (typeof ColdDeviceStorage.get('darkTheme') === 'string')) {
-	ColdDeviceStorage.set('lightTheme', require('@client/themes/l-light.json5'));
-	ColdDeviceStorage.set('darkTheme', require('@client/themes/d-dark.json5'));
-}
-const link = document.createElement('link');
-link.rel = 'stylesheet';
-link.href = 'https://use.fontawesome.com/releases/v5.15.3/css/all.css';
-document.head.appendChild(link);
-// TODOここまで
-
 if (_DEV_) {
 	console.warn('Development mode!!!');