Replace obsolete import contextlib2 with the equivalent stdlib module contextlib

PiperOrigin-RevId: 767547530

Author: oprypin

openhtf/util/console_output.py

@@ -23,6 +23,7 @@
 logger for the current test.
 """
 
+import contextlib
 import logging
 import math
 import os
@@ -32,8 +33,6 @@
 import textwrap
 
 import colorama
-import contextlib2 as contextlib
-
 from openhtf.util import argv
 
 # Colorama module has to be initialized before use.