message: Remove unused generic parameter
diff: @@ -18,7 +18,7 @@ use crate::{Api, Querier, Storage};
  // ibc_channel_open mimicks the call signature of the smart contracts.
  // thus it moves env and channel rather than take them as reference.
  // this is inefficient here, but only used in test code
  -pub fn ibc_channel_open<A, S, Q, U>(
  +pub fn ibc_channel_open<A, S, Q>(
  instance: &mut Instance<A, S, Q>,
  env: Env,
  channel: IbcChannel,
  