Staging: hv: remove FIELD_OFFSET usage

This isn't needed, or even used, at all.

Cc: Hank Janssen <hjanssen@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/include/VmbusChannelInterface.h

@@ -98,15 +98,6 @@ typedef struct
 #pragma pack(pop)
 
 
-//
-// Verify the MAX_PIPE_USER_DEFINED_BYTES value.
-//
-//C_ASSERT(MAX_PIPE_USER_DEFINED_BYTES ==
-//         MAX_USER_DEFINED_BYTES -
-//         (FIELD_OFFSET(VMBUS_CHANNEL_OFFER, u.Pipe.UserDefined) -
-//          FIELD_OFFSET(VMBUS_CHANNEL_OFFER, u.Standard.UserDefined)));
-//
-
 typedef u32 GPADL_HANDLE;
 
 //

drivers/staging/hv/include/osd.h

@@ -37,8 +37,6 @@
 #define LOWORD(dw)		((unsigned short) (dw))
 #define HIWORD(dw)		((unsigned short) (((unsigned int) (dw) >> 16) & 0xFFFF))
 
-#define FIELD_OFFSET(t, f)    ((unsigned int)(unsigned long)&(((t *)0)->f))
-
 #ifdef FALSE
 #undef FALSE
 #endif