UefiCpuPkg/PiSmmCpuDxeSmm: Clean up CheckFeatureSupported()

Removed EFIAPI and parameter from CheckFeatureSupported() and removed
CheckProcessorFeature() totally.

Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>

UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.h

@@ -90,13 +90,10 @@ PageFaultIdtHandlerSmmProfile (
 /**
   Check if XD feature is supported by a processor.
 
-  @param[in,out] Buffer  The pointer to private data buffer.
-
 **/
 VOID
-EFIAPI
 CheckFeatureSupported (
-  IN OUT VOID   *Buffer
+  VOID
   );
 
 /**
@@ -117,15 +114,6 @@ InitPaging (
   VOID
   );
 
-/**
-  Check if XD and BTS features are supported by all processors.
-
-**/
-VOID
-CheckProcessorFeature (
-  VOID
-  );
-
 extern BOOLEAN    mXdSupported;
 extern BOOLEAN    mXdEnabled;