[quick] Fix validity condition in QgsQuickFeatureLayerPair

The extra condition enforcing that feature's geometry needs to have Z coordinate
if also its parent layer has Z coordinates was not doing good job and surprisingly
marking also valid geometries as invalid if layer type was PointZ but the geometry
had undefined Z value. This caused issues in IdentifyKit not picking up some features.

src/quickgui/qgsquickfeaturelayerpair.cpp

@@ -66,8 +66,5 @@ bool QgsQuickFeatureLayerPair::hasValidGeometry() const
   if ( mFeature.geometry().type() != mLayer->geometryType() )
     return false;
 
-  if ( QgsWkbTypes::hasZ( mLayer->wkbType() ) != QgsWkbTypes::hasZ( mFeature.geometry().wkbType() ) )
-    return false;
-
   return true;
 }