Remove unnecessary `error()` log message from the `TcpSendingMessageHandler`

[artembilan]

More info in SO: https://stackoverflow.com/questions/79547786/how-to-silence-spring-integration-tcp-pool-timeout

[shirshak55]

which version is it available? Just wanted to check

I believe only gateway receives the error from the call site, but if we are using adapter, what will happen? I believe there is no error channel on int-ip:tcp-outbound-channel-adapter