Fixed some errors that would be printed while running tests that bind to socket paths

Motivation:

Binding HTTPBin to a socket path generates many warnings in the console that are largely inconsequential, but cloud the results. This removes one of them 😅 (I'm not sure how to address the others)

Modifications:

TCP_NODELAY is now a default option in NIO, so we can leave out the setting completely since it isn't supported when binding to socket paths.

Result:

One fewer warning in the console 🙃

Author: dimitribouniol

Tests/AsyncHTTPClientTests/HTTPClientTestUtils.swift

@@ -234,7 +234,6 @@ internal final class HTTPBin {
 
         self.serverChannel = try! ServerBootstrap(group: self.group)
             .serverChannelOption(ChannelOptions.socket(SocketOptionLevel(SOL_SOCKET), SO_REUSEADDR), value: 1)
-            .childChannelOption(ChannelOptions.socket(IPPROTO_TCP, TCP_NODELAY), value: 1)
             .serverChannelInitializer { channel in
                 channel.pipeline.addHandler(activeConnCounterHandler)
             }.childChannelInitializer { channel in