feat(net): delete useless test code

Author: jwrct

framework/src/test/java/org/tron/core/net/services/AdvServiceTest.java

@@ -5,7 +5,6 @@
 import java.io.IOException;
 import java.net.InetSocketAddress;
 
-import com.google.protobuf.Any;
 import org.junit.AfterClass;
 import org.junit.Assert;
 import org.junit.BeforeClass;