[TD] DrawView*: remove unused includes - part 1

- also sort includes
- also additions to precompiled header

src/Mod/TechDraw/App/DrawViewDimExtentPyImp.cpp

@@ -21,20 +21,13 @@
  ***************************************************************************/
 
 #include "PreCompiled.h"
-#ifndef _PreComp_
-#endif
-
-#include <Base/Console.h>
-#include <Base/PyObjectBase.h>
-#include <Base/Vector3D.h>
 
 #include "DrawViewDimExtent.h"
-
 // inclusion of the generated files (generated out of DrawViewDimExtentPy.xml)
-#include <Base/VectorPy.h>
 #include <Mod/TechDraw/App/DrawViewDimExtentPy.h>
 #include <Mod/TechDraw/App/DrawViewDimExtentPy.cpp>
 
+
 using namespace TechDraw;
 
 // returns a string which represents the object e.g. when printed in python