fix shared channel unavailable issue

Author: liujianjun.ljj

remoting/remoting-triple/src/main/java/com/alipay/sofa/rpc/transport/triple/TripleClientTransport.java

@@ -35,8 +35,6 @@
 import com.alipay.sofa.rpc.event.EventBus;
 import com.alipay.sofa.rpc.ext.Extension;
 import com.alipay.sofa.rpc.interceptor.ClientHeaderClientInterceptor;
-import com.alipay.sofa.rpc.log.Logger;
-import com.alipay.sofa.rpc.log.LoggerFactory;
 import com.alipay.sofa.rpc.message.ResponseFuture;
 import com.alipay.sofa.rpc.server.triple.TripleContants;
 import com.alipay.sofa.rpc.transport.AbstractChannel;