remove unnecessary redis package

services/web/package.json

@@ -55,7 +55,6 @@
     "passport-oauth2-refresh": "^1.0.0",
     "passport-saml": "^0.15.0",
     "pug": "^2.0.0-beta6",
-    "redis": "0.10.1",
     "redis-sharelatex": "git+https://github.com/sharelatex/redis-sharelatex.git#v1.0.4",
     "request": "^2.69.0",
     "requests": "^0.1.7",