Minor performance improvement be removing unecessary shape operations

CPS/src/lu/list/itis/dkd/tui/widget/corona/CoxcombRangeSlice.java

@@ -291,7 +291,6 @@ public class CoxcombRangeSlice extends ValueRangeCorona {
     private void updateSlice() {
         double diameter;
         List<String> lines;
-        Area outer;
         Area inner;
 
         // Java Arc2D start angle and extend are expressed in counter clockwise rotation. Since
@@ -303,20 +302,15 @@ public class CoxcombRangeSlice extends ValueRangeCorona {
         diameter = 2 * innerRadius;
         inner = new Area(new Ellipse2D.Double(-innerRadius, -innerRadius, diameter, diameter));
 
-        diameter = 2 * lowerBoundRadius;
-        outer = new Area(new Ellipse2D.Double(-lowerBoundRadius, -lowerBoundRadius, diameter, diameter));
-
         Shape sector = new Arc2D.Double(-lowerBoundRadius, -lowerBoundRadius, diameter, diameter, correctedAngle, arcSpan, Arc2D.PIE);
         Area initial = new Area(sector);
         initial.subtract(inner);
-        outer.subtract(inner);
         shape = initial;
 
         diameter = 2 * upperBoundRadius;
         sector = new Arc2D.Double(-upperBoundRadius, -upperBoundRadius, diameter, diameter, correctedAngle, arcSpan, Arc2D.PIE);
         face = new Area(sector);
         face.subtract(inner);
-        outer.subtract(inner);
 
         int availableWidth;