fix deprecation

Author: StefanBratanov

libp2p/src/testFixtures/kotlin/io/libp2p/tools/TCPProxy.kt

@@ -8,7 +8,6 @@ import io.netty.channel.ChannelHandlerContext
 import io.netty.channel.ChannelInboundHandlerAdapter
 import io.netty.channel.ChannelOption
 import io.netty.channel.MultiThreadIoEventLoopGroup
-import io.netty.channel.nio.NioEventLoopGroup
 import io.netty.channel.nio.NioIoHandler
 import io.netty.channel.socket.nio.NioServerSocketChannel
 import io.netty.channel.socket.nio.NioSocketChannel
@@ -40,7 +39,6 @@ class TCPProxy {
                                     }
 
                                     override fun channelActive(ctx: ChannelHandlerContext) {
-//                                serverCtx.channel().pipeline().addFirst(LoggingHandler("client", LogLevel.INFO))
                                         client.complete(ctx)
                                     }