Remove merge transition code (#8761)

Co-Authored-By: dapplion <35266934+dapplion@users.noreply.github.com>

testing/state_transition_vectors/src/exit.rs

@@ -1,4 +1,5 @@
 use super::*;
+use beacon_chain::test_utils::test_spec;
 use state_processing::{
     BlockProcessingError, BlockSignatureStrategy, ConsensusContext, VerifyBlockRoot,
     per_block_processing, per_block_processing::errors::ExitInvalid,
@@ -70,13 +71,13 @@ impl ExitTest {
             BlockSignatureStrategy::VerifyIndividual,
             VerifyBlockRoot::True,
             &mut ctxt,
-            &E::default_spec(),
+            &test_spec::<E>(),
         )
     }
 
     #[cfg(all(test, not(debug_assertions)))]
     async fn run(self) -> BeaconState<E> {
-        let spec = &E::default_spec();
+        let spec = &test_spec::<E>();
         let expected = self.expected.clone();
         assert_eq!(STATE_EPOCH, spec.shard_committee_period);
 

testing/state_transition_vectors/src/main.rs

@@ -57,6 +57,7 @@ async fn get_harness<E: EthSpec>(
         .default_spec()
         .keypairs(KEYPAIRS[0..validator_count].to_vec())
         .fresh_ephemeral_store()
+        .mock_execution_layer()
         .build();
     let skip_to_slot = slot - SLOT_OFFSET;
     if skip_to_slot > Slot::new(0) {