[Inspection] remove unused headers and Xerces

- also sort our some includes to PreCompiled.h

src/Mod/Inspection/Gui/VisualInspection.cpp

@@ -20,24 +20,23 @@
  *                                                                         *
  ***************************************************************************/
 
-
 #include "PreCompiled.h"
 #ifndef _PreComp_
 # include <cfloat>
 #endif
-#include "VisualInspection.h"
-#include "ui_VisualInspection.h"
 
-#include <Base/UnitsApi.h>
 #include <App/Document.h>
 #include <App/DocumentObject.h>
-#include <App/Application.h>
 #include <Gui/Command.h>
 #include <Gui/Document.h>
-#include <Gui/ViewProvider.h>
 #include <Gui/Application.h>
 #include <Gui/MainWindow.h>
 #include <Gui/PrefWidgets.h>
+#include <Gui/ViewProvider.h>
+
+#include "VisualInspection.h"
+#include "ui_VisualInspection.h"
+
 
 using namespace InspectionGui;