Remove unused imports in PackageCommand

We have a chunk of imports that are not used: remove them.

Signed-off-by: Robert Varga <robert.varga@pantheon.tech>

Author: rovarga

instance/src/main/java/org/apache/karaf/instance/command/PackageCommand.java

@@ -17,24 +17,11 @@
 package org.apache.karaf.instance.command;
 
 import org.apache.karaf.instance.command.completers.InstanceCompleter;
-import org.apache.karaf.instance.core.Instance;
 import org.apache.karaf.shell.api.action.Argument;
 import org.apache.karaf.shell.api.action.Command;
 import org.apache.karaf.shell.api.action.Completion;
 import org.apache.karaf.shell.api.action.lifecycle.Service;
 
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.nio.file.FileVisitResult;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
-import java.nio.file.SimpleFileVisitor;
-import java.nio.file.attribute.BasicFileAttributes;
-import java.util.zip.ZipEntry;
-import java.util.zip.ZipOutputStream;
-
 @Command(scope = "instance", name = "package", description = "Create a .zip archive of the instance.")
 @Service
 public class PackageCommand extends InstanceCommandSupport {