logfs: remove useless BUG_ON

It prevents write sizes >4k.

Signed-off-by: Joern Engel <joern@logfs.org>
diff --git a/fs/logfs/journal.c b/fs/logfs/journal.c
index 9da2970..1e1c369 100644
--- a/fs/logfs/journal.c
+++ b/fs/logfs/journal.c
@@ -612,7 +612,6 @@
 	if (len == 0)
 		return logfs_write_header(super, header, 0, type);
 
-	BUG_ON(len > sb->s_blocksize);
 	compr_len = logfs_compress(buf, data, len, sb->s_blocksize);
 	if (compr_len < 0 || type == JE_ANCHOR) {
 		memcpy(data, buf, len);