Revert "Enable topological editing on first TopoGeometry layer creation"

This reverts commit edecf38.

The correct way to do this is by hooking on the editingStarted slot
(thanks jef for pointing that out)

src/providers/postgres/qgspostgresprovider.cpp

@@ -23,7 +23,6 @@
 #include <qgsmessagelog.h>
 #include <qgsrectangle.h>
 #include <qgscoordinatereferencesystem.h>
-#include <qgsproject.h>
 
 #include "qgsvectorlayerimport.h"
 #include "qgsprovidercountcalcevent.h"
@@ -133,9 +132,6 @@ QgsPostgresProvider::QgsPostgresProvider( QString const & uri )
       disconnectDb();
       return;
     }
-
-    // Enable topological editing
-    QgsProject::instance()->writeEntry( "Digitizing", "/TopologicalEditing", true );
   }
 
   mLayerExtent.setMinimal();