Fix cache_free fucntion

After we introduced the memory pool for blocks and IRs, we don't need
to free the memory of blocks and IRs by cache.

src/cache.c

@@ -515,31 +515,16 @@ void *cache_put(cache_t *cache, uint32_t key, void *value)
     return delete_value;
 }
 
-void cache_free(cache_t *cache, void (*callback)(void *))
+void cache_free(cache_t *cache)
 {
 #if RV32_HAS(ARC)
     for (int i = 0; i < N_CACHE_LIST_TYPES; i++) {
-        arc_entry_t *entry, *safe;
-#ifdef __HAVE_TYPEOF
-        list_for_each_entry_safe (entry, safe, cache->lists[i], list)
-#else
-        list_for_each_entry_safe (entry, safe, cache->lists[i], list,
-                                  arc_entry_t)
-#endif
-#else /* !RV32_HAS(ARC) */
-    for (int i = 0; i < THRESHOLD; i++) {
-        if (list_empty(cache->lists[i]))
-            continue;
-        lfu_entry_t *entry, *safe;
-#ifdef __HAVE_TYPEOF
-        list_for_each_entry_safe (entry, safe, cache->lists[i], list)
+        free(cache->lists[i]);
+    }
 #else
-        list_for_each_entry_safe (entry, safe, cache->lists[i], list,
-                                  lfu_entry_t)
+    for (int i = 0; i < THRESHOLD; i++)
+        free(cache->lists[i]);
 #endif
-#endif
-            callback(entry->value);
-    }
     mpool_destroy(cache_mp);
     free(cache->map->ht_list_head);
     free(cache->map);

src/cache.h

@@ -37,4 +37,4 @@ void *cache_put(struct cache *cache, uint32_t key, void *value);
  * @cache: a pointer points to target cache
  * @callback: a function for freeing cache entry completely
  */
-void cache_free(struct cache *cache, void (*callback)(void *));
+void cache_free(struct cache *cache);

tests/cache/test-cache.c

@@ -62,7 +62,7 @@ int main(int argc, char *argv[])
             assert(cache);
             printf("NEW CACHE\n");
         } else if (!strcmp(arr[0], "FREE\n")) {
-            cache_free(cache, free);
+            cache_free(cache);
             printf("FREE CACHE\n");
         }
     }