Fix import errors in windows for python3.

Bug: 1017545, 1182016
Change-Id: I14271fb5d34a7e49a0387180befbbf50ee893649
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-py/+/2719992
Commit-Queue: Momo Sasaki <momosasaki@google.com>
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Reviewed-by: Junji Watanabe <jwata@google.com>
GitOrigin-RevId: 8bd684954b02647a9fb036d9852f4017bf6953b4
diff --git a/utils/logging_utils.py b/utils/logging_utils.py
index 14e3c3d..d81eae7 100644
--- a/utils/logging_utils.py
+++ b/utils/logging_utils.py
@@ -34,7 +34,6 @@
 if sys.platform == 'win32':
   import ctypes
   import msvcrt  # pylint: disable=F0401
-  import _subprocess  # pylint: disable=F0401
 
   FILE_ATTRIBUTE_NORMAL = 0x80
   FILE_SHARE_READ = 1
@@ -45,7 +44,7 @@
   OPEN_ALWAYS = 4
 
   # TODO(maruel): Make it work in cygwin too if necessary. This would have to
-  # use ctypes.cdll.kernel32 instead of _subprocess and msvcrt.
+  # use ctypes.cdll.kernel32 instead of msvcrt.
 
 
   def shared_open(path):