[Web] remove unused headers and Xerces

src/Mod/Web/Gui/AppWebGui.cpp

@@ -20,14 +20,10 @@
  *                                                                         *
  ***************************************************************************/
 
-
 #include "PreCompiled.h"
 #ifndef _PreComp_
-# include <Python.h>
-# include <QMdiArea>
-# include <QMdiSubWindow>
-# include <QUrl>
 # include <QIcon>
+# include <QUrl>
 #endif
 
 #include <Base/Console.h>
@@ -35,13 +31,12 @@
 #include <Base/PyObjectBase.h>
 #include <Gui/Application.h>
 #include <Gui/MainWindow.h>
-#include <Gui/WorkbenchManager.h>
 #include <Gui/Language/Translator.h>
+
 #include "BrowserView.h"
 #include "Workbench.h"
 
 
-
 // use a different name to CreateCommand()
 void CreateWebCommands(void);