remove debug-code which zero-filled some structures before free()ing them

lib/hash.c

@@ -44,7 +44,6 @@ hash_element_dtor(void *user, void *element)
 
   h->dtor(e->ptr);
 
-  memset(e, 0, sizeof(struct curl_hash_element));
   free(e);
 }
 
@@ -272,7 +271,6 @@ Curl_hash_destroy(struct curl_hash *h)
 
   Curl_hash_clean(h);
 
-  memset(h, 0, sizeof(struct curl_hash));
   free(h);
 }
 

lib/llist.c

@@ -114,7 +114,6 @@ Curl_llist_remove(struct curl_llist *list, struct curl_llist_element *e,
 
   list->dtor(user, e->ptr);
 
-  memset(e, 0, sizeof(struct curl_llist_element));
   free(e);
   --list->size;
 
@@ -128,7 +127,6 @@ Curl_llist_destroy(struct curl_llist *list, void *user)
     while(list->size > 0)
       Curl_llist_remove(list, list->tail, user);
 
-    memset(list, 0, sizeof(struct curl_llist));
     free(list);
   }
 }