Remove unused imports. Explicitly import a few deep imports.

scripts/bip70

@@ -2,12 +2,8 @@
 # create a BIP70 payment request signed with a certificate
 
 import tlslite
-import time
-import hashlib
 
 from electrum.transaction import Transaction
-from electrum import bitcoin
-from electrum import x509
 from electrum import paymentrequest
 from electrum import paymentrequest_pb2 as pb2
 

scripts/peers

@@ -1,7 +1,6 @@
 #!/usr/bin/env python3
 
-import util, json
-from collections import defaultdict
+import util
 
 from electrum.network import filter_protocol
 from electrum.blockchain import hash_header

scripts/util.py

@@ -1,7 +1,8 @@
-import select, time, electrum, queue
+import select, time, queue
+# import electrum
 from electrum import Connection, Interface, SimpleConfig
 
-from electrum.network import filter_protocol, parse_servers
+from electrum.network import parse_servers
 from collections import defaultdict
 
 # electrum.util.set_verbosity(1)