fix(delay_distance): remove delayOver flag

Author: randym

src/Draggable/Sensors/DragSensor/DragSensor.js

@@ -161,7 +161,6 @@ export default class DragSensor extends Sensor {
     this.trigger(container, dragStopEvent);
 
     this.dragging = false;
-    this.delayOver = false;
     this.startEvent = null;
 
     this[reset]();
@@ -210,7 +209,6 @@ export default class DragSensor extends Sensor {
     this.startEvent = event;
 
     this.mouseDownTimeout = setTimeout(() => {
-      this.delayOver = true;
       target.draggable = true;
       this.draggableElement = target;
     }, this.options.delay);

src/Draggable/Sensors/Sensor/Sensor.js

@@ -39,20 +39,6 @@ export default class Sensor {
      */
     this.currentContainer = null;
 
-    /**
-     * The distance moved from the first pointer down location, no longer updated after the drag has started
-     * @property distance
-     * @type {Number}
-     */
-    this.distance = 0;
-
-    /**
-     * Indicates whether the delay has ended
-     * @property delayOver
-     * @type {Boolean}
-     */
-    this.delayOver = false;
-
     /**
      * The event of the initial sensor down
      * @property startEvent