MdeModulePkg:Refine the UiApp

Use new created libraries(Boot Manager,Device Manager,Boot Maintenance
Manager) in UiApp.So remove and refine relative code in UiApp.And update
the Nt32Pkg.dsc and MdeModulePkg.dsc.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18924 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Application/UiApp/String.h

@@ -65,16 +65,4 @@ UninitializeStringSupport (
   VOID
   );
 
-/**
-  Call the browser and display the front page
-
-  @return   Status code that will be returned by
-            EFI_FORM_BROWSER2_PROTOCOL.SendForm ().
-
-**/
-EFI_STATUS
-CallFrontPage (
-  VOID
-  );
-
 #endif // _STRING_H_