Don't wait for stake distribution

Local cluster starts for more than 3 shelley epochs, so stake
distribution is already working.
In tests we expect precise epochs numbers, so we need to get rid of
any unexpected (potential) waiting. If it happens in the future that we
have local cluster that doesn't have stake distribution working, let it
fail in an expected manner.

cardano_node_tests/tests/delegation.py

@@ -179,7 +179,6 @@ def delegate_stake_addr(
 
     # check that the stake address was delegated
     if check_delegation:
-        clusterlib_utils.wait_for_stake_distribution(cluster_obj)
         stake_addr_info = cluster_obj.get_stake_addr_info(pool_user.stake.address)
         assert stake_addr_info.delegation, f"Stake address was not delegated yet: {stake_addr_info}"
         assert pool_id == stake_addr_info.delegation, "Stake address delegated to wrong pool"

cardano_node_tests/tests/test_delegation.py

@@ -255,8 +255,6 @@ def test_deregister(
             pool_id=delegation_out.pool_id,
         )
 
-        clusterlib_utils.wait_for_stake_distribution(cluster)
-
         src_address = delegation_out.pool_user.payment.address
 
         LOGGER.info("Waiting up to 4 full epochs for first reward.")
@@ -675,8 +673,6 @@ def test_addr_delegation_deregistration(
             == src_registered_balance - tx_raw_output_deleg.fee + cluster.get_address_deposit()
         ), f"Incorrect balance for source address `{user_payment.address}`"
 
-        clusterlib_utils.wait_for_stake_distribution(cluster)
-
         # check that the stake address was NOT delegated
         stake_addr_info = cluster.get_stake_addr_info(user_registered.stake.address)
         assert not stake_addr_info.delegation, f"Stake address was delegated: {stake_addr_info}"