Fix warning when opening attribute table

When init()ing QgsDualView through the attribute table it is
usually done BEFORE the model has been populated, so this code
has no effect and throws a warning.

There's no feature regression by removing this - the first
entry is still selected by default (elsewhere)

src/gui/attributetable/qgsdualview.cpp

@@ -110,8 +110,6 @@ void QgsDualView::init( QgsVectorLayer *layer, QgsMapCanvas *mapCanvas, const Qg
 
   // This slows down load of the attribute table heaps and uses loads of memory.
   //mTableView->resizeColumnsToContents();
-
-  mFeatureList->setEditSelection( QgsFeatureIds() << mFeatureListModel->idxToFid( mFeatureListModel->index( 0, 0 ) ) );
 }
 
 void QgsDualView::columnBoxInit()