How to use the vis-util.removeEventListener function in vis-util

_cleanUp() {
    // automatically adapt to a changing size of the browser.
    if (this.resizeTimer !== undefined) {
      clearInterval(this.resizeTimer);
    }
    util.removeEventListener(window,'resize',this.resizeFunction);
    this.resizeFunction = undefined;
  }

Slider.prototype._onMouseUp = function (event) {  // eslint-disable-line no-unused-vars
  this.frame.style.cursor = 'auto';

  // remove event listeners
  util.removeEventListener(document, 'mousemove', this.onmousemove);
  util.removeEventListener(document, 'mouseup', this.onmouseup);

  util.preventDefault();
};

Slider.prototype._onMouseUp = function (event) {  // eslint-disable-line no-unused-vars
  this.frame.style.cursor = 'auto';

  // remove event listeners
  util.removeEventListener(document, 'mousemove', this.onmousemove);
  util.removeEventListener(document, 'mouseup', this.onmouseup);

  util.preventDefault();
};

Core.prototype._stopAutoResize = function () {
  if (this.watchTimer) {
    clearInterval(this.watchTimer);
    this.watchTimer = undefined;
  }

  // remove event listener on window.resize
  if (this._onResize) {
    util.removeEventListener(window, 'resize', this._onResize);
    this._onResize = null;
  }
};