delete ultraviolet files

public/ultra/ultra.config.js

@@ -1,13 +0,0 @@
-/*global Ultraviolet*/
-// @ts-nocheck
-self.__uv$config = {
-    prefix: '/service/',
-    bare: '/bare/',
-    encodeUrl: Ultraviolet.codec.xor.encode,
-    decodeUrl: Ultraviolet.codec.xor.decode,
-    handler: '/ultra/ultra.handler.js',
-    client: '/ultra/ultra.client.js',
-    bundle: '/ultra/ultra.bundle.js',
-    config: '/ultra/ultra.config.js',
-    sw: '/ultra/ultra.sw.js',
-};