build/sage: overlooked to remove an older sage manifolds (?), also removing the tarball
build/sage: overlooked to remove an older sage manifolds (?), also removing the tarball

tscholl2/smc,sagemathinc/smc,sagemathinc/smc,sagemathinc/smc,tscholl2/smc,tscholl2/smc,DrXyzzy/smc,tscholl2/smc,DrXyzzy/smc,DrXyzzy/smc,sagemathinc/smc,tscholl2/smc,DrXyzzy/smc