chore(deprecations): clean out some warnings

website/server/libs/mongodb.js

@@ -23,15 +23,14 @@ export function getDevelopmentConnectionUrl (originalConnectionUrl) {
 }
 
 export function getDefaultConnectionOptions () {
+  // with keepAlive deprecated, we don't need a separate set of production options
+  // Keeping the structure here in case the distinction is useful later
   const commonOptions = {
     useNewUrlParser: true,
     useUnifiedTopology: true,
   };
 
   return !IS_PROD ? commonOptions : {
-    // See https://mongoosejs.com/docs/connections.html#keepAlive
-    keepAlive: true,
-    keepAliveInitialDelay: 300000,
     ...commonOptions,
   };
 }