Revert "Fixed FlatSpark theme font licensing issue (rat complained about missing license header ... )"

This reverts commit ddb81e0b4833bb744c67132d84a7e639e364dba7.

Signed-off-by: Erik de Bruin <erik@ixsoftware.nl>
Exclude OFL license files from rat's report

Signed-off-by: Erik de Bruin <erik@ixsoftware.nl>