nfs: remove nfs_page_length

The nfs_page_length is not used anywhere, remove it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

fs/nfs/internal.h

@@ -797,25 +797,6 @@ static inline void nfs_folio_mark_unstable(struct folio *folio,
 	}
 }
 
-/*
- * Determine the number of bytes of data the page contains
- */
-static inline
-unsigned int nfs_page_length(struct page *page)
-{
-	loff_t i_size = i_size_read(page->mapping->host);
-
-	if (i_size > 0) {
-		pgoff_t index = page_index(page);
-		pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
-		if (index < end_index)
-			return PAGE_SIZE;
-		if (index == end_index)
-			return ((i_size - 1) & ~PAGE_MASK) + 1;
-	}
-	return 0;
-}
-
 /*
  * Determine the number of bytes of data the page contains
  */