Bug 1801836 - Remove no longer necessary 'from __future__' imports. r=linter-reviewers,glandium,webdriver-reviewers,perftest-reviewers,geckoview-reviewers,jld,ahal,owlish,afinder DONTBUILD

Differential Revision: https://phabricator.services.mozilla.com/D165395

configure.py

@@ -2,8 +2,6 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-from __future__ import absolute_import, print_function, unicode_literals
-
 import codecs
 import errno
 import io
@@ -250,7 +248,6 @@ def config_status(config, execute=True):
                 """\
             #!%(python)s
             # coding=utf-8
-            from __future__ import unicode_literals
         """
             )
             % {"python": config["PYTHON3"]}