Drop UI Server

This patch drops the dedicated UI server. It is undocumented, needs
attention and does not have a huge advantage over `./start.sh ui` which
is relatively fast by now.

package.json

@@ -2,7 +2,6 @@
   "name": "pyCA",
   "private": true,
   "scripts": {
-    "server": "ui/server.js",
     "build": "parcel build --public-url=/static/ --out-dir=pyca/ui/static/ ui/index.html",
     "eslint": "eslint ui/func.js"
   },
@@ -19,8 +18,6 @@
   "devDependencies": {
     "eslint": "^7.16.0",
     "eslint-plugin-vue": "^7.3.0",
-    "express": "^4.17.1",
-    "http-proxy-middleware": "^1.0.6",
     "parcel-bundler": "^1.12.4"
   }
 }