uml: remove unused fields from mm_context

The 3-level page table fixes forgot to remove a couple now-unused fields from
struct mm_context.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/um/include/um_mmu.h

@@ -12,10 +12,6 @@
 
 typedef struct mm_context {
 	struct mm_id id;
-	unsigned long last_page_table;
-#ifdef CONFIG_3_LEVEL_PGTABLES
-	unsigned long last_pmd;
-#endif
 	struct uml_ldt ldt;
 } mm_context_t;