Fix checkstyle issues

Author: mohanvive

component/src/main/java/io/siddhi/extension/execution/file/FileCopyExtension.java

@@ -36,8 +36,6 @@
 import io.siddhi.query.api.definition.Attribute;
 import org.apache.commons.vfs2.FileObject;
 import org.apache.commons.vfs2.FileSystemException;
-import org.apache.commons.vfs2.FileSystemManager;
-import org.apache.commons.vfs2.FileSystemOptions;
 import org.apache.commons.vfs2.Selectors;
 import org.apache.log4j.Logger;
 
@@ -122,6 +120,7 @@
         }
 )
 public class FileCopyExtension extends StreamFunctionProcessor {
+
     private static final Logger log = Logger.getLogger(FileCopyExtension.class);
     private Pattern pattern = null;
     private int inputExecutorLength;