Build fix -- missing file

Author: rjeberhard

operator/src/test/java/oracle/kubernetes/operator/utils/CertificatesTest.java

@@ -18,7 +18,6 @@
 import static oracle.kubernetes.operator.logging.MessageKeys.NO_EXTERNAL_CERTIFICATE;
 import static oracle.kubernetes.operator.logging.MessageKeys.NO_INTERNAL_CERTIFICATE;
 import static oracle.kubernetes.utils.LogMatcher.containsConfig;
-import static oracle.kubernetes.utils.LogMatcher.containsWarning;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.notNullValue;
 import static org.hamcrest.Matchers.nullValue;