Re-fix memory leak

After consideration, this still looks correct.

Thanks-to: Anthony Minessale <anthm@freeswitch.org>

ref: FS-6783
ref: FS-6775

src/mod/applications/mod_hash/mod_hash.c

@@ -310,7 +310,7 @@ SWITCH_LIMIT_RELEASE(limit_release_hash)
 
 			switch_core_hash_delete(pvt->hash, (const char *) key);
 		}
-		//switch_core_hash_destroy(&pvt->hash);
+		switch_core_hash_destroy(&pvt->hash);
 	} else {
 		char *hashkey = switch_core_session_sprintf(session, "%s_%s", realm, resource);