Remove unused import

test/functional/bip9-softforks.py

@@ -16,7 +16,6 @@ test that enforcement has not triggered (which triggers ACTIVE)
 test that enforcement has triggered
 """
 
-from test_framework.blockstore import BlockStore
 from test_framework.test_framework import ComparisonTestFramework
 from test_framework.util import *
 from test_framework.mininode import CTransaction, NetworkThread

test/functional/net.py

@@ -7,11 +7,9 @@
 Tests correspond to code in rpc/net.cpp.
 """
 
-from decimal import Decimal
 import time
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.authproxy import JSONRPCException
 from test_framework.util import (
     assert_equal,
     start_nodes,

test/functional/p2p-versionbits-warning.py

@@ -12,7 +12,6 @@ from test_framework.mininode import *
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import *
 import re
-import time
 from test_framework.blocktools import create_block, create_coinbase
 
 VB_PERIOD = 144 # versionbits period length for regtest