ocfs2: Revert "ocfs2: fix the la space leak when unmounting an ocfs2 volume"

This reverts commit dfe6c5692f ("ocfs2: fix the la space leak when
unmounting an ocfs2 volume").

In commit dfe6c5692f, the commit log "This bug has existed since the
initial OCFS2 code." is wrong. The correct introduction commit is
30dd3478c3 ("ocfs2: correctly use ocfs2_find_next_zero_bit()").

The influence of commit dfe6c5692f is that it provides a correct
fix for the latest kernel. however, it shouldn't be pushed to stable
branches. Let's use this commit to revert all branches that include
dfe6c5692f and use a new fix method to fix commit 30dd3478c3.

Fixes: dfe6c5692f ("ocfs2: fix the la space leak when unmounting an ocfs2 volume")
Signed-off-by: Heming Zhao <heming.zhao@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/ocfs2/localalloc.c

@@ -1008,25 +1008,6 @@ static int ocfs2_sync_local_to_main(struct ocfs2_super *osb,
 		start = bit_off + 1;
 	}
 
-	/* clear the contiguous bits until the end boundary */
-	if (count) {
-		blkno = la_start_blk +
-			ocfs2_clusters_to_blocks(osb->sb,
-					start - count);
-
-		trace_ocfs2_sync_local_to_main_free(
-				count, start - count,
-				(unsigned long long)la_start_blk,
-				(unsigned long long)blkno);
-
-		status = ocfs2_release_clusters(handle,
-				main_bm_inode,
-				main_bm_bh, blkno,
-				count);
-		if (status < 0)
-			mlog_errno(status);
-	}
-
 bail:
 	if (status)
 		mlog_errno(status);