fix: remove unused import in integration_tests.rs to clean up warnings

Co-Authored-By: [email protected] <[email protected]>

Author: devin-ai-integration[bot]

target_chains/stylus/contracts/pyth-receiver/src/integration_tests.rs

@@ -1,6 +1,5 @@
 #[cfg(test)]
 mod test {
-    use super::*;
     use crate::PythReceiver;
     use alloy_primitives::{address, U256};
     use stylus_sdk::testing::*;