This reverts commit c23d3ca1f0.
Reason for revert: Update to Emscripten 3.1.50 has been merged.
Change-Id: Ie2082dcc2ee34a6d4e519c143037fda9678be234
Reviewed-by: Even Oscar Andersen <even.oscar.andersen@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Jøger Hansegård <joger.hansegard@qt.io>