Temporarily remove mime from upload-asset.js.
Temporarily remove mime from upload-asset.js.

nickerso/libcellml,nickerso/libcellml,hsorby/libcellml,cellml/libcellml,nickerso/libcellml,cellml/libcellml,hsorby/libcellml,hsorby/libcellml,hsorby/libcellml,cellml/libcellml,cellml/libcellml,nickerso/libcellml