Vlv2TbltDevicePkg/PlatformBdsLib: Remove the unused variable

Vlv2TbltDevicePkg/PlatformBdsLib: Remove the unused variable

Fix the following error from gcc:

Vlv2TbltDevicePkg/Library/PlatformBdsLib/BdsPlatform.c: In function ?BdsLockFv?:
Vlv2TbltDevicePkg/Library/PlatformBdsLib/BdsPlatform.c:2170:31: error: variable ?Data? set but not used [-Werror=unused-but-set-variable]

Cc: David Wei <david.wei@intel.com>
Cc: "Wu, Hao A" <hao.a.wu@intel.com>
Cc: "Lu, ShifeiX A" <shifeix.a.lu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: David Wei <david.wei@intel.com>