Fix test

test/core/transport/bdp_estimator_test.cc

@@ -58,12 +58,10 @@ void AddSamples(BdpEstimator *estimator, int64_t *samples, size_t n) {
   estimator->AddIncomingBytes(1234567);
   inc_time();
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  EXPECT_TRUE(estimator->NeedPing(&exec_ctx));
   estimator->SchedulePing();
   estimator->StartPing();
   for (size_t i = 0; i < n; i++) {
     estimator->AddIncomingBytes(samples[i]);
-    EXPECT_FALSE(estimator->NeedPing(&exec_ctx));
   }
   gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
                                gpr_time_from_millis(1, GPR_TIMESPAN)));