__HAVE_PMAP_COLLECT is not defined on i386 and amd64, these functions
are unused.

ok?

Index: arch/i386/i386/pmap.c
===================================================================
RCS file: /cvs/src/sys/arch/i386/i386/pmap.c,v
diff -u -p -r1.224 pmap.c
--- arch/i386/i386/pmap.c	1 Nov 2024 12:07:53 -0000	1.224
+++ arch/i386/i386/pmap.c	2 Nov 2024 07:35:24 -0000
@@ -2254,25 +2254,6 @@ pmap_unwire_86(struct pmap *pmap, vaddr_
 }
 
 /*
- * pmap_collect: free resources held by a pmap
- *
- * => optional function.
- * => called when a process is swapped out to free memory.
- */
-
-void
-pmap_collect(struct pmap *pmap)
-{
-	/*
-	 * free all of the pt pages by removing the physical mappings
-	 * for its entire address space.
-	 */
-
-	pmap_do_remove(pmap, VM_MIN_ADDRESS, VM_MAX_ADDRESS,
-	    PMAP_REMOVE_SKIPWIRED);
-}
-
-/*
  * pmap_enter: enter a mapping into a pmap
  *
  * => must be done "now" ... no lazy-evaluation
Index: arch/amd64/amd64/pmap.c
===================================================================
RCS file: /cvs/src/sys/arch/amd64/amd64/pmap.c,v
diff -u -p -r1.177 pmap.c
--- arch/amd64/amd64/pmap.c	2 Oct 2024 18:18:27 -0000	1.177
+++ arch/amd64/amd64/pmap.c	2 Nov 2024 07:36:04 -0000
@@ -2266,27 +2268,6 @@ pmap_unwire(struct pmap *pmap, vaddr_t v
 #endif
 }
 
-#if 0
-/*
- * pmap_collect: free resources held by a pmap
- *
- * => optional function.
- * => called when a process is swapped out to free memory.
- */
-
-void
-pmap_collect(struct pmap *pmap)
-{
-	/*
-	 * free all of the pt pages by removing the physical mappings
-	 * for its entire address space.
-	 */
-
-	pmap_do_remove(pmap, VM_MIN_ADDRESS, VM_MAX_ADDRESS,
-	    PMAP_REMOVE_SKIPWIRED);
-}
-#endif
-
 void
 pmap_enter_special(vaddr_t va, paddr_t pa, vm_prot_t prot)
 {