ext4: remove ext4_inline_data_fiemap() declaration

ext4_inline_data_fiemap() has been removed since
commit d3b6f23f ("ext4: move ext4_fiemap to use iomap framework"),
so remove it.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Link: https://lore.kernel.org/r/20220909065307.1155201-1-cuigaosheng1@huawei.comSigned-off-by: Theodore Ts'o <tytso@mit.edu>

fs/ext4/ext4.h

@@ -3591,9 +3591,6 @@ extern bool empty_inline_dir(struct inode *dir, int *has_inline_data);
 extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
 					struct ext4_dir_entry_2 **parent_de,
 					int *retval);
-extern int ext4_inline_data_fiemap(struct inode *inode,
-				   struct fiemap_extent_info *fieinfo,
-				   int *has_inline, __u64 start, __u64 len);
 extern void *ext4_read_inline_link(struct inode *inode);
 
 struct iomap;