The cc:work node is usually reserved for information about the Work (like credit, format etc.). Could it be that sketch is annotating the SVG with cc:license? dc:type or dc:format? Please check your SVG in a text editor. If so… there should be no trouble cleaning out the node and its content <cc:work>...</cc:work> or even the full <metadata id="license"...> branch
Thank you @MaxZieb and @Daniel. I checked the SVGs and it seems to come from Inkscape. At least the SVGs who are affected are not the ones exported from Sketch.