Revert flush changes

packages/backend/src/server/web/views/flush.pug

@@ -1,27 +1,7 @@
 doctype html
 
 html
-
-	head
-		meta(charset='utf-8')
-		meta(name='application-name' content='Misskey')
-		title Misskey Repair Tool
-		style.
-			* {
-				font-family: BIZ UDGothic, Roboto, HelveticaNeue, Arial, sans-serif;
-				font-size: 16px;
-				color: #dfddcc;
-			}
-
-			body,
-			html {
-				background-color: #222;
-				justify-content: center;
-				margin: auto;
-				padding: 10px;
-				text-align: center;
-			}
-
+	#msg
 	script.
 		const msg = document.getElementById('msg');
 		const successText = `\nSuccess Flush! <a href="/">Back to Misskey</a>\n成功しました。<a href="/">Misskeyを開き直してください。</a>`;
@@ -65,6 +45,3 @@ html
 		function message(text) {
 			msg.insertAdjacentHTML('beforeend', `<p>[${(new Date()).toString()}] ${text.replace(/\n/g,'<br>')}</p>`)
 		}
-
-	body
-		#msg