fix(clippy): remove duplicate #![cfg(test)] from api and credit test files

Author: sheyman546

contracts/api/src/test.rs

@@ -1,4 +1,3 @@
-#![cfg(test)]
 use soroban_sdk::{testutils::Address as _, testutils::Ledger as _, Address, Bytes, BytesN, Env};
 use subtrackr_types::{ApiKeyConfig, ApiKeyStatus, RateLimitConfig, TimeRange, UsageTier};
 

contracts/credit/src/test.rs

@@ -1,5 +1,3 @@
-#![cfg(test)]
-
 use super::*;
 use soroban_sdk::{testutils::Address as _, testutils::Ledger as _, Address, Env, String};