remove now unused redlock

package.json

@@ -29,7 +29,6 @@
     "connect-redis": "^6.0.0",
     "cookie": "^0.4.1",
     "core-js": "^3.20.2",
-    "cors": "^2.8.4",
     "etag": "^1.8.1",
     "express": "^4.17.2",
     "express-session": "^1.17.2",
@@ -59,7 +58,6 @@
     "react-stay-scrolled": "^7.4.0",
     "react-toggle-button": "^2.1.0",
     "redis": "^3.1.2",
-    "redlock": "^4.0.0",
     "redux": "^4.1.2",
     "redux-logger": "^3.0.6",
     "redux-persist": "^6.0.0",

src/data/redis.js

@@ -2,7 +2,6 @@
 
 import bluebird from 'bluebird';
 import redis from 'redis';
-import Redlock from 'redlock';
 
 import { REDIS_URL } from '../core/config';
 
@@ -10,27 +9,4 @@ bluebird.promisifyAll(redis.RedisClient.prototype);
 bluebird.promisifyAll(redis.Multi.prototype);
 const client = redis.createClient(REDIS_URL, { return_buffers: true });
 
-export const redlock = new Redlock(
-  // you should have one redis for each redis node
-  // in your cluster
-  [client],
-  {
-    // the expected clock drift; for more details
-    // see http://redis.io/topics/distlock
-    driftFactor: 0.01, // time in ms
-
-    // the max number of times Redlock will attempt
-    // to lock a resource before erroring
-    retryCount: 5,
-
-    // the time in ms between attempts
-    retryDelay: 200, // time in ms
-
-    // the max time in ms randomly added to retries
-    // to improve performance under high contention
-    // see https://www.awsarchitectureblog.com/2015/03/backoff.html
-    retryJitter: 200, // time in ms
-  },
-);
-
 export default client;