1. DomName('CanvasRenderingContext2D.removeHitRegion')
  2. DocsEditable()
  3. Experimental()
void removeHitRegion(String id)

Source 

@DomName('CanvasRenderingContext2D.removeHitRegion')
@DocsEditable()
@Experimental() // untriaged
void removeHitRegion(String id) => _blink.BlinkCanvasRenderingContext2D.instance.removeHitRegion_Callback_1_(this, id);