docs: public static KV<String, SmartForest<List<String>>> remove(String key) {
          KV<String, SmartForest<List<String>>> kv = SYNONYMS.get(key);
          if (kv != null && kv.getV() != null) { //先清空后删除
              kv.getV().clear();
          }
          MyStaticValue.ENV.remove(key);
          return SYNONYMS.remove(key);
      }