ext4: kill unused function ext4_journalled_write_inline_data

Commit 3f079114 ("ext4: Convert data=journal writeback to use ext4_writepages()")
Added support for writeback of journalled data into ext4_writepages()
and killed function __ext4_journalled_writepage() which used to call
ext4_journalled_write_inline_data() for inline data.
This function got left over by mistake. Hence kill it's definition as
no one uses it.
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Link: https://lore.kernel.org/r/122b2a8d5e0650686f23ed6da26ed9e04105562b.1684122756.git.ritesh.list@gmail.comSigned-off-by: Theodore Ts'o <tytso@mit.edu>

fs/ext4/ext4.h

@@ -3484,10 +3484,6 @@ extern int ext4_write_inline_data_end(struct inode *inode,
 				      loff_t pos, unsigned len,
 				      unsigned copied,
 				      struct page *page);
-extern struct buffer_head *
-ext4_journalled_write_inline_data(struct inode *inode,
-				  unsigned len,
-				  struct page *page);
 extern int ext4_da_write_inline_data_begin(struct address_space *mapping,
 					   struct inode *inode,
 					   loff_t pos, unsigned len,

fs/ext4/inline.c

@@ -823,30 +823,6 @@ int ext4_write_inline_data_end(struct inode *inode, loff_t pos, unsigned len,
 	return ret ? ret : copied;
 }
 
-struct buffer_head *
-ext4_journalled_write_inline_data(struct inode *inode,
-				  unsigned len,
-				  struct page *page)
-{
-	int ret, no_expand;
-	void *kaddr;
-	struct ext4_iloc iloc;
-
-	ret = ext4_get_inode_loc(inode, &iloc);
-	if (ret) {
-		ext4_std_error(inode->i_sb, ret);
-		return NULL;
-	}
-
-	ext4_write_lock_xattr(inode, &no_expand);
-	kaddr = kmap_atomic(page);
-	ext4_write_inline_data(inode, &iloc, kaddr, 0, len);
-	kunmap_atomic(kaddr);
-	ext4_write_unlock_xattr(inode, &no_expand);
-
-	return iloc.bh;
-}
-
 /*
  * Try to make the page cache and handle ready for the inline data case.
  * We can call this function in 2 cases: