Removed unused imports

src/main/java/no/bioforsk/vips/model/applescabmodel/AppleScabModel.java

 package no.bioforsk.vips.model.applescabmodel;
 
-import java.text.DateFormat;
-import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.ArrayList;
 import java.util.Calendar;