Removing unused library

npm-shrinkwrap.json

@@ -8170,11 +8170,6 @@
             "picomatch": "^2.0.4"
          }
       },
-      "readline": {
-         "version": "1.3.0",
-         "resolved": "https://registry.npmjs.org/readline/-/readline-1.3.0.tgz",
-         "integrity": "sha1-xYDXfvLPyHUrEySYBg3JeTp6wBw="
-      },
       "redis": {
          "version": "3.0.2",
          "resolved": "https://registry.npmjs.org/redis/-/redis-3.0.2.tgz",