OLCesium destroy function doesn't remove all listeners

[mvoermans]

I have an OpenLayers map with a projection that Cesium doesn't support.

map = new Map({
     view: new View({
          projection: 'EPSG:28992'
     })
})

Before init OlCesium I change the View projection

map.setView( 
      new View({
            projection: 'EPSG:3857',
      })
 )

Then I go to 3D and create an OlCesium instance (This works!!)

olCesium = new OLCesium()

But then I go back to 2D and I destroy the OlCesium instance

olCesium.destroy()

Change the projection back to EPSG:28992

map.setView( new View({
        projection: 'EPSG:28992',
 }))

Then I get an javascript error in Cesium

[mvoermans]

Thanks @gberaudo for this quick fix!