Remove downcasting helper

Author: chipshort

CHANGELOG.md

@@ -17,8 +17,6 @@ and this project adheres to
   `Uint64::from_{be,le}_bytes`. ([#2269])
 - cosmwasm-std: Added new `Ibc2Msg` and `CosmosMsg::Ibc2` variant ([#2340],
   [#2390], [#2403])
-- cosmwasm-std: Implement downcasting for `Api` trait. This allows using
-  `MockApi::addr_make` from `DepsMut`. ([#2457])
 - cosmwasm-std: Added `ibc2_port` to `ContractInfoResponse`. ([#2390], [#2403])
 - cosmwasm-vm: Added `ibc2_packet_receive` entrypoint ([#2403])
 - cosmwasm-vm: Add IBC Callbacks entrypoints to the `Entrypoints` enum.
@@ -99,7 +97,6 @@ and this project adheres to
 [#2432]: https://github.com/CosmWasm/cosmwasm/pull/2432
 [#2433]: https://github.com/CosmWasm/cosmwasm/pull/2433
 [#2438]: https://github.com/CosmWasm/cosmwasm/pull/2438
-[#2457]: https://github.com/CosmWasm/cosmwasm/issues/2457
 
 ## [2.2.0] - 2024-12-17
 

Cargo.lock

@@ -69,7 +69,6 @@ serde_json = "1.0.140"
 static_assertions = "1.1.0"
 thiserror = "1.0.26"
 rmp-serde = "1.3.0"
-rustversion = "1.0"
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 bech32 = "0.11.0"

contracts/burner/Cargo.lock

@@ -2715,16 +2715,4 @@ mod tests {
         // we are not interested in the exact humanization, just that it works
         mock_api.addr_humanize(&canonical_addr).unwrap();
     }
-
-    #[rustversion::since(1.86)]
-    #[test]
-    fn mock_api_downcast() {
-        let mut deps = mock_dependencies();
-        let deps_mut = deps.as_mut();
-
-        let mock_api = deps_mut.api.cast_to_mockapi().unwrap();
-
-        let addr = mock_api.addr_make("input");
-        assert_eq!(mock_api.addr_validate(addr.as_str()).unwrap(), addr);
-    }
 }

contracts/crypto-verify/Cargo.lock

@@ -329,34 +329,6 @@ pub trait Api: Any {
     fn debug(&self, message: &str);
 }
 
-#[rustversion::since(1.86)]
-impl dyn Api {
-    /// Casts the Api trait object to the underlying [`MockApi`] type.
-    /// Returns `None` if the underlying type is not a [`MockApi`].
-    /// This function is only available since Rust 1.86.0.
-    ///
-    /// This is useful in places where you only have access to `Deps` or `DepsMut` during testing,
-    /// but need to use features from the [`MockApi`]:
-    ///
-    /// ```rust
-    /// use cosmwasm_std::{testing::mock_dependencies, Addr, Deps, Api};
-    ///
-    /// fn admin_address(deps: Deps) -> Addr {
-    ///    let mock_api = deps.api.cast_to_mockapi().unwrap();
-    ///    mock_api.addr_make("admin")
-    /// }
-    ///
-    /// let mut deps = mock_dependencies();
-    /// let addr = admin_address(deps.as_ref());
-    /// assert_eq!(deps.api.addr_validate(addr.as_str()).unwrap(), addr);
-    /// ```
-    ///
-    /// [`MockApi`]: crate::testing::MockApi
-    pub fn cast_to_mockapi(&self) -> Option<&crate::testing::MockApi> {
-        (self as &dyn Any).downcast_ref()
-    }
-}
-
 /// A short-hand alias for the two-level query result (1. accessing the contract, 2. executing query in the contract)
 pub type QuerierResult = SystemResult<ContractResult<Binary>>;