not logging to file in an example

Change-Id: I25de6e2bedf96ebefa28477228154a000eed9f0e

example/multi_threaded_echo_c++/client.cpp

@@ -86,10 +86,6 @@ int main(int argc, char* argv[]) {
     // Parse gflags. We recommend you to use gflags as well.
     google::ParseCommandLineFlags(&argc, &argv, true);
 
-    logging::LoggingSettings settings;
-    settings.logging_dest = logging::LOG_TO_FILE;
-    CHECK(logging::InitLogging(settings));
-
     // A Channel represents a communication line to a Server. Notice that 
     // Channel is thread-safe and can be shared by all threads in your program.
     brpc::Channel channel;