apollo_gateway: remove redundant state_reader test file (#10473)

Author: ArniStarkware

crates/apollo_gateway/src/lib.rs

@@ -8,8 +8,6 @@ pub mod rpc_state_reader;
 #[cfg(test)]
 mod rpc_state_reader_test;
 mod state_reader;
-#[cfg(test)]
-mod state_reader_test;
 #[cfg(any(feature = "testing", test))]
 mod state_reader_test_utils;
 mod stateful_transaction_validator;