fs/buffer.c: remove duplicated assignment to b_private

bh->b_private is initialized within init_buffer(), thus this assignment is
redundant.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/buffer.c b/fs/buffer.c
index ec21a92..8d595ab 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -905,7 +905,6 @@
 
 		bh->b_state = 0;
 		atomic_set(&bh->b_count, 0);
-		bh->b_private = NULL;
 		bh->b_size = size;
 
 		/* Link the buffer to its page */