fix build

Author: TaiJuWu

clients/src/test/java/org/apache/kafka/common/utils/UtilsTest.java

@@ -77,7 +77,6 @@
 import static org.apache.kafka.common.utils.Utils.formatBytes;
 import static org.apache.kafka.common.utils.Utils.getHost;
 import static org.apache.kafka.common.utils.Utils.getPort;
-import static org.apache.kafka.common.utils.Utils.getProtocol;
 import static org.apache.kafka.common.utils.Utils.intersection;
 import static org.apache.kafka.common.utils.Utils.mkEntry;
 import static org.apache.kafka.common.utils.Utils.murmur2;