Remove unused SYNC_STATE import from integration tests

The SYNC_STATE import was removed from the integration_tests.rs file because it was unused. This was probably a leftover from some previously refactored code, and its presence might have led to confusion, hence it has been removed.

testing/integration/src/integration_tests.rs

@@ -44,7 +44,6 @@ use kaspa_hashes::Hash;
 use flate2::read::GzDecoder;
 use futures_util::future::try_join_all;
 use itertools::Itertools;
-use kaspa_consensus::sync_state::SYNC_STATE;
 use kaspa_consensus_core::config::params::DAAWindowParams;
 use kaspa_core::core::Core;
 use kaspa_core::info;