Clean up unneeded changes

Author: vrom911

nix/hydra/demo.nix

@@ -120,12 +120,10 @@
                   --hydra-signing-key ${self}/demo/carol.sk \
                   --hydra-verification-key ${self}/demo/alice.vk \
                   --hydra-verification-key ${self}/demo/bob.vk \
-                  --hydra-verification-key ${self}/demo/carol.vk \
                   --hydra-scripts-tx-id ''$HYDRA_SCRIPTS_TX_ID \
                   --cardano-signing-key devnet/credentials/carol.sk \
                   --cardano-verification-key devnet/credentials/alice.vk \
                   --cardano-verification-key devnet/credentials/bob.vk \
-                  --cardano-verification-key devnet/credentials/carol.vk \
                   --ledger-protocol-parameters devnet/protocol-parameters.json \
                   --testnet-magic 42 \
                   --node-socket devnet/node.socket \