[tests] Remove unused and duplicate imports

contrib/testgen/gen_base58_test_vectors.py

@@ -13,7 +13,7 @@ Usage:
 # Released under MIT License
 import os
 from itertools import islice
-from base58 import b58encode, b58decode, b58encode_chk, b58decode_chk, b58chars
+from base58 import b58encode_chk, b58decode_chk, b58chars
 import random
 from binascii import b2a_hex
 

test/functional/import-rescan.py

@@ -22,7 +22,6 @@ happened previously.
 from test_framework.authproxy import JSONRPCException
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (start_nodes, connect_nodes, sync_blocks, assert_equal, set_node_times)
-from decimal import Decimal
 
 import collections
 import enum

test/functional/segwit.py

@@ -6,11 +6,10 @@
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import *
-from test_framework.mininode import sha256, ripemd160, CTransaction, CTxIn, COutPoint, CTxOut, COIN
+from test_framework.mininode import sha256, CTransaction, CTxIn, COutPoint, CTxOut, COIN, ToHex, FromHex
 from test_framework.address import script_to_p2sh, key_to_p2pkh
-from test_framework.script import CScript, OP_HASH160, OP_CHECKSIG, OP_0, hash160, OP_EQUAL, OP_DUP, OP_EQUALVERIFY, OP_1, OP_2, OP_CHECKMULTISIG, hash160, OP_TRUE
+from test_framework.script import CScript, OP_HASH160, OP_CHECKSIG, OP_0, hash160, OP_EQUAL, OP_DUP, OP_EQUALVERIFY, OP_1, OP_2, OP_CHECKMULTISIG, OP_TRUE
 from io import BytesIO
-from test_framework.mininode import ToHex, FromHex, COIN
 
 NODE_0 = 0
 NODE_1 = 1

test/functional/smartfees.py

@@ -4,11 +4,10 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test fee estimation code."""
 
-from collections import OrderedDict
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import *
 from test_framework.script import CScript, OP_1, OP_DROP, OP_2, OP_HASH160, OP_EQUAL, hash160, OP_TRUE
-from test_framework.mininode import CTransaction, CTxIn, CTxOut, COutPoint, ToHex, FromHex, COIN
+from test_framework.mininode import CTransaction, CTxIn, CTxOut, COutPoint, ToHex, COIN
 
 # Construct 2 trivial P2SH's and the ScriptSigs that spend them
 # So we can create many many transactions without needing to spend

test/functional/test_framework/socks5.py

@@ -5,7 +5,6 @@
 """Dummy Socks5 server for testing."""
 
 import socket, threading, queue
-import traceback, sys
 import logging
 
 logger = logging.getLogger("TestFramework.socks5")

test/functional/test_framework/test_framework.py

@@ -11,7 +11,6 @@ import sys
 import shutil
 import tempfile
 import time
-import traceback
 
 from .util import (
     initialize_chain,