message: remove pre-go server compatibility query param
diff: @@ -69,9 +69,8 @@ export class PrometheusUsageMetrics implements UsageMetrics {
  async getUsage(): Promise<KeyUsage[]> {
  const timeDeltaSecs = Math.round((Date.now() - this.resetTimeMs) / 1000);
  // We measure the traffic to and from the target, since that's what we are protecting.
  - // TODO: remove >p< once the ss-libev support is gone.
  - const result = await this.prometheusClient.query(
  - `sum(increase(shadowsocks_data_bytes{dir=~">p<|p>t|p<t"}[${
  + const result =
  + await this.prometheusClient.query(`sum(increase(shadowsocks_data_bytes{dir=~"p>t|p<t"}[${
  timeDeltaSecs}s])) by (location, access_key)`);
  const usage = [] as KeyUsage[];
  for (const entry of result.result) {
  