FIX: the game now uses the url hash to choose the start layer

front/src/Connexion/Room.ts

@@ -6,10 +6,8 @@ export class Room {
     public readonly isPublic: boolean;
     private mapUrl: string|undefined;
     private instance: string|undefined;
-    public readonly hash: string;
 
     constructor(id: string) {
-        this.hash = '';
         if (id.startsWith('/')) {
             id = id.substr(1);
         }
@@ -24,9 +22,7 @@ export class Room {
 
         const indexOfHash = this.id.indexOf('#');
         if (indexOfHash !== -1) {
-            const idWithHash = this.id;
             this.id = this.id.substr(0, indexOfHash);
-            this.hash = idWithHash.substr(indexOfHash + 1);
         }
     }