Remove stubborn test
Remove stubborn test

recwarn doesn't seem to be working as expected when the whole
suite is run

0xDCA/marshmallow,daniloakamine/marshmallow,marshmallow-code/marshmallow,Tim-Erwin/marshmallow,xLegoz/marshmallow,maximkulkin/marshmallow,mwstobo/marshmallow,quxiaolong1504/marshmallow,dwieeb/marshmallow,VladimirPal/marshmallow,0xDCA/marshmallow,Bachmann1234/marshmallow,etataurov/marshmallow,bartaelterman/marshmallow