vm_page.h: remove no longer defined (P) locking annotation

Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D53963

sys/vm/vm_page.h

@@ -230,7 +230,7 @@ struct vm_page {
 		} uma;
 	} plinks;
 	vm_object_t object;		/* which object am I in (O) */
-	vm_pindex_t pindex;		/* offset into object (O,P) */
+	vm_pindex_t pindex;		/* offset into object (O) */
 	vm_paddr_t phys_addr;		/* physical address of page (C) */
 	struct md_page md;		/* machine dependent stuff */
 	u_int ref_count;		/* page references (A) */
@@ -238,7 +238,7 @@ struct vm_page {
 	union vm_page_astate a;		/* state accessed atomically (A) */
 	uint8_t order;			/* index of the buddy queue (F) */
 	uint8_t pool;			/* vm_phys freepool index (F) */
-	uint8_t flags;			/* page PG_* flags (P) */
+	uint8_t flags;			/* page PG_* flags */
 	uint8_t oflags;			/* page VPO_* flags (O) */
 	int8_t psind;			/* pagesizes[] index (O) */
 	int8_t segind;			/* vm_phys segment index (C) */