[view/multiview][s]: do not call fetch on dataset model in MultiView initialize (should be done in code using the view if needed).

* fetch method should have been done elsewhere (by client of the view)
* calling in the view is both wasteful and causes possible bugs as it may lead to race conditions to a fetch called by client code

src/view.multiview.js

@@ -228,10 +228,6 @@ my.MultiView = Backbone.View.extend({
     // note this.model and dataset returned are the same
     // TODO: set query state ...?
     this.model.queryState.set(self.state.get('query'), {silent: true});
-    this.model.fetch()
-      .fail(function(error) {
-        self.notify({message: error.message, category: 'error', persist: true});
-      });
   },
 
   setReadOnly: function() {