Remove some unnecessary #if/#ifdef from some header files.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2598 6f19259b-4bc3-4df7-8a09-765794883524

EdkModulePkg/Include/Protocol/UgaIo.h

@@ -63,7 +63,6 @@ typedef struct _UGA_DEVICE {
 }
 UGA_DEVICE, *PUGA_DEVICE;
 
-#ifndef UGA_IO_REQUEST_CODE
 //
 // Prevent conflicts with UGA typedefs.
 //
@@ -94,8 +93,6 @@ typedef enum {
 }
 UGA_IO_REQUEST_CODE, *PUGA_IO_REQUEST_CODE;
 
-#endif
-
 typedef struct {
   IN UGA_IO_REQUEST_CODE  ioRequestCode;
   IN VOID                 *pvInBuffer;