message: router: remove bad test (master fix)
  This test was removed in because it doesn't make any sense anymore
  when per try timeouts don't start until the connection is ready. Somehow
  this stayed in during merge, causing master to break.
diff: @@ -1336,23 +1336,28 @@ TEST_F(RouterTest, RetryUpstreamPerTryTimeout) {
  EXPECT_TRUE(verifyHostUpstreamStats(1, 1));
  }
  -TEST_F(RouterTest, RetryUpstreamPerTryTimeoutNoUpstreamHost) {
  +// Asserts that onHostAttempted is *not* called when the upstream connection fails in such
  +// a way that no host is present.
  +TEST_F(RouterTest, RetryUpstreamConnectionFailure) {
  + Http::ConnectionPool::Callbacks* conn_pool_callbacks;
  EXPECT_CALL(cm_.conn_pool_, newStream(_, _))
  - .WillOnce(Invoke([&](Http::StreamDecoder&, Http::ConnectionPool::Callbacks&)
  - -> Http::ConnectionPool::Cancellable* { return nullptr; }));
  + .WillOnce(Invoke([&](Http::StreamDecoder&, Http::ConnectionPool::Callbacks& callbacks)
  + -> Http::ConnectionPool::Cancellable* {
  + conn_pool_callbacks = &callbacks;
  + return nullptr;
  + }));
  expectResponseTimerCreate();
  - expectPerTryTimerCreate();
  - Http::TestHeaderMapImpl headers{{"x-envoy-retry-on", "5xx"},
  - {"x-envoy-internal", "true"},
  - {"x-envoy-upstream-rq-per-try-timeout-ms", "5"}};
  + Http::TestHeaderMapImpl headers{{"x-envoy-retry-on", "5xx"}, {"x-envoy-internal", "true"}};
  HttpTestUtility::addDefaultHeaders(headers);
  router_.decodeHeaders(headers, true);
  EXPECT_CALL(*router_.retry_state_, onHostAttempted(_)).Times(0);
  router_.retry_state_->expectRetry();
  - per_try_timeout_->callback_();
  +
  + conn_pool_callbacks->onPoolFailure(Http::ConnectionPool::PoolFailureReason::ConnectionFailure,
  + nullptr);
  Http::StreamDecoder* response_decoder = nullptr;
  // We expect this reset to kick off a new request.
  @@ -1364,7 +1369,6 @@ TEST_F(RouterTest, RetryUpstreamPerTryTimeoutNoUpstreamHost) {
  callbacks.onPoolReady(encoder2, cm_.conn_pool_.host_);
  return nullptr;
  }));
  - expectPerTryTimerCreate();
  router_.retry_state_->callback_();
  EXPECT_CALL(*router_.retry_state_, onHostAttempted(_));
  