The thing is, in the 90’s Saddam was against Syria. Infact Saddam was arming the lebanese army(backed by most christians) while it was fighting off the syrians. Syria was onboard with GW1 and got everyone else to butt out of lebanon, where it exiled one christian leader, assassinated another and jailed the remaining christian leader because he refused to take part in a puppet government. So basically in GW1, I dont think there was a threat that he would move his weapons to syria, given that saddam was a longtime enemy of Bashar al assad, also given syrias close ties to iran and the fact that saddam had just come out of a long and bloody war with iran in 1988 its doubtful that there was any cooperation in GW 1 over weapons transfers.
correction: Saddam was a longtime enemy of HAFEZ al assad. Bashar is his son and current leader.