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;

EdkModulePkg/Library/EdkGenericPlatformBdsLib/BootMaint/BootMaint.h

@@ -85,16 +85,14 @@ Revision History
 // Check to see if current build support option active feature of
 // some driver option
 //
-#ifndef LOAD_OPTION_ACTIVE
 #define LOAD_OPTION_ACTIVE  0x00000001
-#endif
+
 //
 // Check to see if current build support force reconnect feature of
 // some driver option
 //
-#ifndef LOAD_OPTION_FORCE_RECONNECT
 #define LOAD_OPTION_FORCE_RECONNECT 0x00000002
-#endif
+
 //
 // Below are the form ids for display, form id is used as callback key value,
 // some key value definitions are also defined here. By defining this enum type,

EdkModulePkg/Library/EdkGenericPlatformBdsLib/Language.h

@@ -24,9 +24,7 @@ Revision History
 #ifndef _LANGUAGE_H
 #define _LANGUAGE_H
 
-#ifndef ISO_639_2_ENTRY_SIZE
 #define ISO_639_2_ENTRY_SIZE  3
-#endif
 
 VOID
 InitializeLanguage (

EdkNt32Pkg/Dxe/PlatformBds/Generic/BootMaint/BootMaint.h

@@ -85,16 +85,14 @@ Revision History
 // Check to see if current build support option active feature of
 // some driver option
 //
-#ifndef LOAD_OPTION_ACTIVE
 #define LOAD_OPTION_ACTIVE  0x00000001
-#endif
+
 //
 // Check to see if current build support force reconnect feature of
 // some driver option
 //
-#ifndef LOAD_OPTION_FORCE_RECONNECT
 #define LOAD_OPTION_FORCE_RECONNECT 0x00000002
-#endif
+
 //
 // Below are the form ids for display, form id is used as callback key value,
 // some key value definitions are also defined here. By defining this enum type,

EdkNt32Pkg/Dxe/PlatformBds/Generic/Language.h

@@ -24,9 +24,7 @@ Revision History
 #ifndef _LANGUAGE_H
 #define _LANGUAGE_H
 
-#ifndef ISO_639_2_ENTRY_SIZE
 #define ISO_639_2_ENTRY_SIZE  3
-#endif
 
 VOID
 InitializeLanguage (

MdePkg/Include/Protocol/IP4.h

@@ -83,13 +83,8 @@ typedef struct {
 #pragma pack(1)
 
 typedef struct {
-#ifdef EFI_NET_LITTLE_ENDIAN
   UINT8                   HeaderLength:4;
   UINT8                   Version:4;
-#else 
-  UINT8                   Version:4;
-  UINT8                   HeaderLength:4;
-#endif
   UINT8                   TypeOfService;
   UINT16                  TotalLength;
   UINT16                  Identification;