[composer] Don't save hide bounding box setting between sessions

In practice the workflow is better if this setting is only
temporarily applied to a composer.

Author: nyalldawson

src/core/composer/qgscomposition.cpp

@@ -216,7 +216,6 @@ void QgsComposition::loadDefaults()
   mSnapGridOffsetX = settings.value( "/Composer/defaultSnapGridOffsetX", 0 ).toDouble();
   mSnapGridOffsetY = settings.value( "/Composer/defaultSnapGridOffsetY", 0 ).toDouble();
   mSnapTolerance = settings.value( "/Composer/defaultSnapTolerancePixels", 5 ).toInt();
-  mBoundingBoxesVisible = settings.value( "/Composer/showBoundingBoxes", true ).toBool();
 }
 
 void QgsComposition::updateBounds()
@@ -2148,10 +2147,6 @@ void QgsComposition::setBoundingBoxesVisible( const bool boundsVisible )
 {
   mBoundingBoxesVisible = boundsVisible;
 
-  //save to settings
-  QSettings settings;
-  settings.setValue( "/Composer/showBoundingBoxes", mBoundingBoxesVisible );
-
   if ( mSelectionHandles )
   {
     mSelectionHandles->update();