[MAINT/CLN] Remove code made unusable due to license issue
[MAINT/CLN] Remove code made unusable due to license issue

statsmodels/statsmodels,josef-pkt/statsmodels,bashtage/statsmodels,statsmodels/statsmodels,josef-pkt/statsmodels,jseabold/statsmodels,statsmodels/statsmodels,bashtage/statsmodels,josef-pkt/statsmodels,statsmodels/statsmodels,bashtage/statsmodels,josef-pkt/statsmodels,statsmodels/statsmodels,jseabold/statsmodels,bashtage/statsmodels,jseabold/statsmodels,jseabold/statsmodels,statsmodels/statsmodels,bashtage/statsmodels,jseabold/statsmodels,josef-pkt/statsmodels,josef-pkt/statsmodels,bashtage/statsmodels