Revert "Some basic sanity checking in MatGSO"
Revert "Some basic sanity checking in MatGSO"

This reverts commit f9436a3681f3118cd6476d88320ca11dc1b7e5f3.

dstehle/fplll,dstehle/fplll,cr-marcstevens/fplll,fplll/fplll,cr-marcstevens/fplll,fplll/fplll,dstehle/fplll,cr-marcstevens/fplll,fplll/fplll,fplll/fplll,fplll/fplll,cr-marcstevens/fplll