Revert "app/model: Hub: Add ability for multi. instances"

This reverts commit d7e158d6.

app/model/Hub.js

@@ -41,19 +41,10 @@ class Hub {
 
     this.waitAsync = async (id, locations, rejectFunc) => {
       let promise = new Promise((resolve, reject) => {
-        let devices = this.drivers[id]
-
-        // Keep device informations.
-
-        if (!devices) {
-          devices = []
-          this.drivers[id] = devices
-        }
-
-        devices.push({
+        this.drivers[id] = {
           resolve: resolve,
           reject: reject
-        })
+        }
 
         // Pass reject function.
         if (rejectFunc) {
@@ -64,41 +55,25 @@ class Hub {
         indexLambda(id, locations)
       })
 
-      try {
-        return await promise
-      } finally {
-        // Remove indexed locations.
-        unindexLambda(id, locations)
+      let userId = await promise
+
+      // Remove indexed locations.
+      unindexLambda(id, locations)
 
-        delete this.drivers[id]
-      }
+      return userId
     }
   }
 
   filter (location) {
-    return [...this.locations[location] || []]
+    return this.locations[location]
   }
 
   pick (id, userId) {
-    let handle = this.drivers[id]
-
-    if (handle) {
-      handle.forEach(h => h.resolve(userId))
-      return true
-    }
-
-    return false
+    this.drivers[id].resolve(userId)
   }
 
   reject (id, reason) {
-    let handle = this.drivers[id]
-
-    if (handle) {
-      handle.forEach(h => h.reject(reason))
-      return true
-    }
-
-    return false
+    this.drivers[id].reject(reason)
   }
 }