Remove unused imports. Explicitly import a few deep imports.

plugins/ledger/auth2fa.py

@@ -1,7 +1,6 @@
 from binascii import hexlify, unhexlify
-import threading
 
-from PyQt5.Qt import (QDialog, QInputDialog, QLineEdit, QTextEdit, QVBoxLayout, QLabel)
+from PyQt5.Qt import QDialog, QLineEdit, QTextEdit, QVBoxLayout, QLabel
 import PyQt5.QtCore as QtCore
 from PyQt5.QtWidgets import *
 
@@ -9,8 +8,8 @@ from electrum.i18n import _
 from electrum_gui.qt.util import *
 from electrum.util import print_msg
 
-import os, hashlib, websocket, threading, logging, json, copy
-from electrum_gui.qt.qrcodewidget import QRCodeWidget, QRDialog
+import os, hashlib, websocket, logging, json, copy
+from electrum_gui.qt.qrcodewidget import QRCodeWidget
 from btchip.btchip import *
 
 DEBUG = False

plugins/ledger/ledger.py

@@ -1,19 +1,16 @@
 from struct import pack, unpack
 import hashlib
-import time
 import sys
-import os
 import traceback
 
-import electrum
 from electrum import bitcoin
 from electrum.bitcoin import TYPE_ADDRESS, int_to_hex, var_int
 from electrum.i18n import _
-from electrum.plugins import BasePlugin, hook
-from electrum.keystore import Hardware_KeyStore, parse_xpubkey
-from electrum.transaction import push_script, Transaction
+from electrum.plugins import BasePlugin
+from electrum.keystore import Hardware_KeyStore
+from electrum.transaction import Transaction
 from ..hw_wallet import HW_PluginBase
-from electrum.util import format_satoshis_plain, print_error, is_verbose, bfh, bh2u
+from electrum.util import print_error, is_verbose, bfh, bh2u
 
 try:
     import hid

plugins/ledger/qt.py

@@ -1,8 +1,6 @@
 import threading
 
-from PyQt5.Qt import (QDialog, QInputDialog, QLineEdit,
-                      QVBoxLayout, QLabel)
-import PyQt5.QtCore as QtCore
+from PyQt5.Qt import QInputDialog, QLineEdit, QVBoxLayout, QLabel
 
 from electrum.i18n import _
 from .ledger import LedgerPlugin