Fix Qt warning following removal of deprecated class

Author: nyalldawson

src/app/composer/qgscomposer.cpp

@@ -798,7 +798,6 @@ void QgsComposer::connectCompositionSlots()
   connect( mComposition, SIGNAL( composerLegendAdded( QgsComposerLegend* ) ), this, SLOT( addComposerLegend( QgsComposerLegend* ) ) );
   connect( mComposition, SIGNAL( composerPictureAdded( QgsComposerPicture* ) ), this, SLOT( addComposerPicture( QgsComposerPicture* ) ) );
   connect( mComposition, SIGNAL( composerShapeAdded( QgsComposerShape* ) ), this, SLOT( addComposerShape( QgsComposerShape* ) ) );
-  connect( mComposition, SIGNAL( composerTableAdded( QgsComposerAttributeTable* ) ), this, SLOT( addComposerTable( QgsComposerAttributeTable* ) ) );
   connect( mComposition, SIGNAL( composerTableFrameAdded( QgsComposerAttributeTableV2*, QgsComposerFrame* ) ), this, SLOT( addComposerTableV2( QgsComposerAttributeTableV2*, QgsComposerFrame* ) ) );
   connect( mComposition, SIGNAL( itemRemoved( QgsComposerItem* ) ), this, SLOT( deleteItem( QgsComposerItem* ) ) );
   connect( mComposition, SIGNAL( paperSizeChanged() ), mHorizontalRuler, SLOT( update() ) );