Remove deprectated scripts from build dir

I think https://gitlab.gwdg.de/dariah-de/textgridlab/textgrid-laboratory/-/blob/develop/unify-project-names and https://gitlab.gwdg.de/dariah-de/textgridlab/textgrid-laboratory/-/blob/develop/setup-push-urls.sh are not needed anymore. Are there more scripts which are obsolete?