Revert "Upgrade to Ryu 4.29."
Revert "Upgrade to Ryu 4.29."

This reverts commit 7ab2c84375647cc8457a1d23f3744172f3874be0.

trungdtbk/faucet,shivarammysore/faucet,mwutzke/faucet,gizmoguy/faucet,REANNZ/faucet,REANNZ/faucet,trungdtbk/faucet,anarkiwi/faucet,shivarammysore/faucet,gizmoguy/faucet,anarkiwi/faucet,faucetsdn/faucet,faucetsdn/faucet,mwutzke/faucet