fix extent assertions

these Extent assertions were breaking tests where rectangles
that crossed the dateline were added. These assertions are
not required within the Extent logic since it is prepared
for bounding boxes that span the dateline

server/src/main/java/org/elasticsearch/common/geo/Extent.java

@@ -29,8 +29,6 @@
  * Object representing the extent of a geometry object within a {@link ShapeTreeWriter}.
  */
 public class Extent implements Writeable {
-    static final int WRITEABLE_SIZE_IN_BYTES = 24;
-
     public int top;
     public int bottom;
     public int negLeft;
@@ -79,8 +77,6 @@ public void reset(int top, int bottom, int negLeft, int negRight, int posLeft, i
      * @param topRightY   the top-right y-coordinate
      */
     public void addRectangle(int bottomLeftX, int bottomLeftY, int topRightX, int topRightY) {
-        assert bottomLeftX <= topRightX;
-        assert bottomLeftY <= topRightY;
         this.bottom = Math.min(this.bottom, bottomLeftY);
         this.top = Math.max(this.top, topRightY);
         if (bottomLeftX < 0 && topRightX < 0) {