Remove Framework HII "class\subclass" in all VFR

Remove Framework HII "class\subclass"  in all VFR

class/subclass is the obseleted key word in VFR file. It is designed in framework HII.
After convert to UEFI HII, it is not used any longer. Now remove them from VFR

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17493 6f19259b-4bc3-4df7-8a09-765794883524