message: admin: fix compilation error
diff: @@ -673,22 +673,16 @@ Http::Code AdminImpl::handlerResetCounters(absl::string_view, Http::HeaderMap&,
  }
  envoy::admin::v2alpha::ServerInfo::State AdminImpl::serverState() {
  - envoy::admin::v2alpha::ServerInfo::State state;
  -
  switch (server_.initManager().state()) {
  case Init::Manager::State::Uninitialized:
  - state = envoy::admin::v2alpha::ServerInfo::PRE_INITIALIZING;
  - break;
  + return envoy::admin::v2alpha::ServerInfo::PRE_INITIALIZING;
  case Init::Manager::State::Initializing:
  - state = envoy::admin::v2alpha::ServerInfo::INITIALIZING;
  - break;
  + return envoy::admin::v2alpha::ServerInfo::INITIALIZING;
  case Init::Manager::State::Initialized:
  - state = server_.healthCheckFailed() ? envoy::admin::v2alpha::ServerInfo::DRAINING
  + return server_.healthCheckFailed() ? envoy::admin::v2alpha::ServerInfo::DRAINING
  : envoy::admin::v2alpha::ServerInfo::LIVE;
  - break;
  }
  -
  - return state;
  + NOT_REACHED_GCOVR_EXCL_LINE;
  }
  Http::Code AdminImpl::handlerServerInfo(absl::string_view, Http::HeaderMap& headers,
  