fs/hfsplus/extents.c: remove unused variable in hfsplus_get_block

The variable is defined but not used.  Generally it compiles away with
-O2 optimization hence it does not show a warning.
Signed-off-by: Sougata Santra <sougata@tuxera.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/hfsplus/extents.c

@@ -227,10 +227,8 @@ int hfsplus_get_block(struct inode *inode, sector_t iblock,
 	u32 ablock, dblock, mask;
 	sector_t sector;
 	int was_dirty = 0;
-	int shift;
 
 	/* Convert inode block to disk allocation block */
-	shift = sbi->alloc_blksz_shift - sb->s_blocksize_bits;
 	ablock = iblock >> sbi->fs_shift;
 
 	if (iblock >= hip->fs_blocks) {