MIPS: Remove prototype for copy_user_page

MIPS architecture code does not provide copy_user_page,
so it should not provide a prototype for it either.

Signed-off-by: Guenter Roeck <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Patchwork: https://patchwork.linux-mips.org/patch/9266/
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/include/asm/page.h

···
 		flush_data_cache_page((unsigned long)addr);
 }
 
-extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
-	struct page *to);
 struct vm_area_struct;
 extern void copy_user_highpage(struct page *to, struct page *from,
 	unsigned long vaddr, struct vm_area_struct *vma);