'**SUMMARY**
Remove all of the drawing layers.
**RETURNS**
None.
**EXAMPLE**
>>> img = Image("Lenna")
>>> myLayer1 = DrawingLayer((img.width,img.height))
>>> myLayer2 = DrawingLayer((img.width,img.height))
>>> img.insertDrawingLayer(myLayer1,1) # on top
>>> img.insertDrawingLayer(myLayer2,2) # on the bottom
>>> img.clearLayers()
**SEE ALSO**
:py:class:`DrawingLayer`
:py:meth:`dl`
:py:meth:`toPygameSurface`
:py:meth:`getDrawingLayer`
:py:meth:`removeDrawingLayer`
:py:meth:`layers`
:py:meth:`mergedLayers`
:py:meth:`applyLayers`
:py:meth:`drawText`
:py:meth:`drawRectangle`
:py:meth:`drawCircle`
:py:meth:`blit`'

def clearLayers(self):

    for i in self._mLayers:
        self._mLayers.remove(i)
    return None
