fixed flake8 issues to pass CI test

Signed-off-by: Juergen Eckel <juergen@riddleandcode.com>

bigchaindb/upsert_validator/validator_utils.py

@@ -2,8 +2,7 @@ import codecs
 import base64
 import binascii
 
-from abci.types_pb2 import (Validator,
-                            ValidatorUpdate,
+from abci.types_pb2 import (ValidatorUpdate,
                             PubKey)
 from bigchaindb.common.exceptions import InvalidPublicKey
 

tests/tendermint/conftest.py

@@ -15,10 +15,8 @@ def validator_pub_key():
 
 @pytest.fixture
 def init_chain_request():
-    addr = codecs.decode(b'9FD479C869C7D7E7605BF99293457AA5D80C3033', 'hex')
     pk = codecs.decode(b'VAgFZtYw8bNR5TMZHFOBDWk9cAmEu3/c6JgRBmddbbI=',
                        'base64')
     val_a = types.ValidatorUpdate(power=10,
                                   pub_key=types.PubKey(type='ed25519', data=pk))
-
     return types.RequestInitChain(validators=[val_a])

tests/tendermint/test_core.py

@@ -2,7 +2,6 @@
 # SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
-import codecs
 import json
 import pytest
 import random
@@ -14,7 +13,6 @@ from abci.types_pb2 import (
     RequestInfo,
     RequestBeginBlock,
     RequestEndBlock,
-    Validator,
     ValidatorUpdate,
 )
 
@@ -49,7 +47,6 @@ def generate_address():
 
 
 def generate_validator():
-    addr = codecs.decode(generate_address(), 'hex')
     pk, _ = generate_key_pair()
     pub_key = PubKey(type='ed25519', data=pk.encode())
     val = ValidatorUpdate(power=10, pub_key=pub_key)