removed redis from devDeps

Author: mcollina

package.json

@@ -27,7 +27,6 @@
   "homepage": "https://github.com/fastify/fastify-redis#readme",
   "devDependencies": {
     "fastify": "^1.9.0",
-    "redis": "^2.8.0",
     "standard": "^11.0.1",
     "tap": "^12.0.1"
   },