This is to let httplib2 import its sock.py in __init__.py correctly.
This is pointed out in
https://groups.google.com/a/chromium.org/d/msg/chromium-dev/8BF_cywS9JY/8g-HHmuqEQAJ

Also removed an unnecessary httplib2 import.

Change-Id: Iad0377ad282acd9e1e222890f522e4e62086dcaf
Reviewed-on: https://chromium-review.googlesource.com/c/1475255Reviewed-by: Yoshisato Yanagisawa <yyanagisawa@google.com>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>