message: Remove unnecessary import.
diff: @@ -14,8 +14,6 @@ use casper_types::{
  api_error, bytesrepr::ToBytes, contracts::Parameters, CLType, ContractHash, EntryPoint,
  EntryPointAccess, EntryPointType, EntryPoints, RuntimeArgs,
  };
  -#[allow(unused_imports)] // TODO: Is this required?
  -use contract_api::runtime as _;
  #[no_mangle]
  pub extern "C" fn do_nothing() {
  