Attribution doesnt get removed

[trafficonese]

When using Leaflet Control Layers, the attribution of the WMS Layer stays the same.

    // Add WMS source/layers
    var source = L.wms.source("http://ows.terrestris.de/osm/service", {
            "format": "image/png",
            "transparent": "true",
            "attribution": "Some attribution to be removed, when 'Topographic' is not selected in LayerControls",
            "info_format": "text/html",
            "tiled": false
     });
    
    var layers = {'Topographic': source.getLayer("TOPO-WMS").addTo(map)};

    // Create layer control
    L.control.layers(undefined, layers).addTo(map);

When using Leaflets WMS Method, the attribution is shown and hidden correctly:

	var source = L.tileLayer.wms('http://ows.terrestris.de/osm/service?', {
		layers: "TOPO-WMS",
		format: "image/png",
		transparent: "true",
		attribution: "Some attribution to be removed, when 'Topographic' is not selected in LayerControls",
		info_format: "text/html",
		tiled: false
     })
    
    var layers = {'Topographic': source.addTo(map)};

    // Create layer control
    L.control.layers(undefined, layers).addTo(map);