remove unnecessary ioredis package

services/web/package.json

@@ -29,7 +29,6 @@
     "heapdump": "^0.3.7",
     "helmet": "^3.8.1",
     "http-proxy": "^1.8.1",
-    "ioredis": "^2.4.0",
     "jade": "~1.3.1",
     "jsonwebtoken": "^8.0.1",
     "ldapjs": "^0.7.1",