Remove Python 2 compat leftovers

py65/monitor.py

@@ -22,6 +22,8 @@ import shlex
 import sys
 import traceback
 
+from urllib.request import urlopen
+
 from py65.devices.mpu6502 import MPU as NMOS6502
 from py65.devices.mpu65c02 import MPU as CMOS65C02
 from py65.devices.mpu65org16 import MPU as V65Org16
@@ -32,10 +34,6 @@ from py65.utils import console
 from py65.utils.conversions import itoa
 from py65.memory import ObservableMemory
 
-try:
-    from urllib2 import urlopen
-except ImportError: # Python 3
-    from urllib.request import urlopen
 
 class Monitor(cmd.Cmd):
 

py65/tests/test_monitor.py

@@ -2,12 +2,10 @@ import unittest
 import sys
 import os
 import tempfile
-from py65.monitor import Monitor
 
-try:
-    from StringIO import StringIO
-except ImportError: # Python 3
-    from io import StringIO
+from io import StringIO
+
+from py65.monitor import Monitor
 
 
 class MonitorTests(unittest.TestCase):