HADOOP-19004. checkstyle

Change-Id: Ifcb9274dcb0124f5dc2f9a5acf6cb0c7b5280bfe

Author: steveloughran

hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/auth/ITestHttpSigner.java

@@ -36,7 +36,6 @@
 import org.apache.hadoop.security.UserGroupInformation;
 
 import static org.apache.hadoop.fs.s3a.Constants.CUSTOM_SIGNERS;
-import static org.apache.hadoop.fs.s3a.Constants.ENABLE_MULTI_DELETE;
 import static org.apache.hadoop.fs.s3a.Constants.HTTP_SIGNER_CLASS_NAME;
 import static org.apache.hadoop.fs.s3a.Constants.SIGNING_ALGORITHM_S3;
 import static org.apache.hadoop.fs.s3a.Constants.HTTP_SIGNER_ENABLED;