Removed code to remove old oRTP submodules as it removes the right one on...

Removed code to remove old oRTP submodules as it removes the right one on MacOSX because it's not case sensitive

prepare.py

@@ -155,10 +155,6 @@ class DesktopPreparator(prepare.Preparator):
         if "python" in self.args.target or "python-raspberry" in self.args.target:
             ret |= not self.check_python_module_is_present('wheel')
 
-        if os.path.isdir('submodules/oRTP'):
-            import shutil
-            shutil.rmtree('submodules/oRTP')
-
         return ret
 
     def show_missing_dependencies(self):