Remove Q from ViewModels (#390)

I got cold feet at the thought of merging #324 in one go, so I'm going to split it into smaller chunks and keep rebasing the large one until there's no more Q.

src/Explorer/Tree/ResourceTokenCollection.ts

@@ -41,9 +41,9 @@ export default class ResourceTokenCollection implements ViewModels.CollectionBas
     this.isCollectionExpanded = ko.observable<boolean>(true);
   }
 
-  public expandCollection(): Q.Promise<void> {
+  public expandCollection(): void {
     if (this.isCollectionExpanded()) {
-      return Q();
+      return;
     }
 
     this.isCollectionExpanded(true);
@@ -55,8 +55,6 @@ export default class ResourceTokenCollection implements ViewModels.CollectionBas
       defaultExperience: this.container.defaultExperience(),
       dataExplorerArea: Constants.Areas.ResourceTree,
     });
-
-    return Q.resolve();
   }
 
   public collapseCollection() {