gfs2: remove unused LBIT macros

Since commit 223b2b88 ("GFS2: Fix alignment issue and tidy
gfs2_bitfit"), these 3 macros aren't used anymore, so remove them.
Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

fs/gfs2/rgrp.c

@@ -36,16 +36,6 @@
 #define BFITNOENT ((u32)~0)
 #define NO_BLOCK ((u64)~0)
 
-#if BITS_PER_LONG == 32
-#define LBITMASK   (0x55555555UL)
-#define LBITSKIP55 (0x55555555UL)
-#define LBITSKIP00 (0x00000000UL)
-#else
-#define LBITMASK   (0x5555555555555555UL)
-#define LBITSKIP55 (0x5555555555555555UL)
-#define LBITSKIP00 (0x0000000000000000UL)
-#endif
-
 /*
  * These routines are used by the resource group routines (rgrp.c)
  * to keep track of block allocation.  Each block is represented by two