Remove unused Python imports

contrib/devtools/github-merge.py

@@ -15,7 +15,7 @@
 # In case of a clean merge that is accepted by the user, the local branch with
 # name $BRANCH is overwritten with the merged result, and optionally pushed.
 from __future__ import division,print_function,unicode_literals
-import os,sys
+import os
 from sys import stdin,stdout,stderr
 import argparse
 import hashlib

test/functional/blockchain.py

@@ -23,8 +23,6 @@ from test_framework.util import (
     assert_raises_jsonrpc,
     assert_is_hex_string,
     assert_is_hash_string,
-    start_nodes,
-    connect_nodes_bi,
 )
 
 

test/functional/net.py

@@ -15,7 +15,6 @@ from test_framework.util import (
     assert_raises_jsonrpc,
     connect_nodes_bi,
     p2p_port,
-    start_nodes,
 )
 
 

test/functional/rpcnamedargs.py

@@ -8,7 +8,6 @@ from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
     assert_raises_jsonrpc,
-    start_nodes,
 )
 
 

test/functional/signmessages.py

@@ -5,7 +5,6 @@
 """Test RPC commands for signing and verifying messages."""
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
 
 class SignMessagesTest(BitcoinTestFramework):
 

test/functional/wallet-accounts.py

@@ -15,7 +15,6 @@ RPCs tested are:
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
-    start_nodes,
     assert_equal,
 )
 

test/functional/wallet-hd.py

@@ -6,7 +6,6 @@
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
-    start_nodes,
     start_node,
     assert_equal,
     connect_nodes_bi,