drop redundant foreign key which has been dropped in 1.3.1 sql file
fixes:
package org.zstack.header.volume;
import org.zstack.header.configuration.DiskOfferingEO;
-import org.zstack.header.image.ImageEO;
import org.zstack.header.storage.primary.PrimaryStorageEO;
-import org.zstack.header.vm.VmInstanceEO;
import org.zstack.header.vo.ForeignKey;
import org.zstack.header.vo.ForeignKey.ReferenceOption;
import org.zstack.header.vo.Index;
@@ -34,7 +32,6 @@ public class VolumeAO extends ResourceVO implements ShadowEntity {
private String diskOfferingUuid;
@Column
- @ForeignKey(parentEntityClass = ImageEO.class, onDeleteAction = ReferenceOption.SET_NULL)
private String rootImageUuid;
@Column
