The 1903 American WCF has also deleted the "synagogues of Satan" and the language in ch. 25 of the Papal Anti-Christ.
This is why as a PCA teaching elder I subscribe to the original confession and not the American edition. It would be interesting to see why the American edition elimiated this language. In my opinion it was a serious compromise. Many reformed denominations such as the RPCNA subscribe to the original confession.