btrfs: remove check for BTRFS_FS_STATE_ERROR which we just set

__btrfs_handle_fs_error() sets BTRFS_FS_STATE_ERROR, and calls
btrfs_handle_error() so no need to check if the BTRFS_FS_STATE_ERROR
is set in btrfs_handle_error(). And there is no other user of
btrfs_handle_error() as well.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/super.c

@@ -115,7 +115,6 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info)
 	if (sb_rdonly(sb))
 		return;
 
-	if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) {
 	sb->s_flags |= SB_RDONLY;
 	btrfs_info(fs_info, "forced readonly");
 	/*
@@ -128,7 +127,6 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info)
 	 * mounted writeable again, the device replace
 	 * operation continues.
 	 */
-	}
 }
 
 /*