Revert "fix complains from flake8"

This reverts commit 60af4109ab.

src/helper_msgcoding.py

@@ -2,6 +2,7 @@
 Message encoding end decoding functions
 """
 
+import string
 import zlib
 
 import messagetypes

src/network/asyncore_pollchoose.py

@@ -11,6 +11,7 @@ import select
 import socket
 import sys
 import time
+import warnings
 from errno import (
     EADDRINUSE, EAGAIN, EALREADY, EBADF, ECONNABORTED, ECONNREFUSED,
     ECONNRESET, EHOSTUNREACH, EINPROGRESS, EINTR, EINVAL, EISCONN, ENETUNREACH,

src/randomtrackingdict.py

@@ -3,6 +3,7 @@ Track randomize ordered dict
 """
 from threading import RLock
 from time import time
+from binascii import hexlify
 
 try:
     import helper_random

src/storage/sqlite.py

@@ -1,6 +1,7 @@
 """
 Sqlite Inventory
 """
+import sqlite3
 import time
 from threading import RLock
 

src/tr.py

@@ -42,7 +42,7 @@ def translateText(context, text, n=None):
         enableGUI = True
     if enableGUI:
         try:
-            from PyQt6 import QtWidgets
+            from PyQt6 import QtCore, QtGui, QtWidgets
         except Exception as err:
             print('PyBitmessage requires PyQt unless you want to run it as a daemon'
                   ' and interact with it using the API.'