Updated files with 'repo_helper'. (#74)

Co-authored-by: repo-helper[bot] <74742576+repo-helper[bot]@users.noreply.github.com>

Author: repo-helper[bot]

__pkginfo__.py

@@ -1,15 +1,4 @@
 #  This file is managed by 'repo_helper'. Don't edit it directly.
-#  Copyright © 2020 Dominic Davis-Foster <dominic@davis-foster.co.uk>
-#
-#  This file is distributed under the same license terms as the program it came with.
-#  There will probably be a file called LICEN[S/C]E in the same directory as this file.
-#
-#  In any case, this program is distributed in the hope that it will be useful,
-#  but WITHOUT ANY WARRANTY; without even the implied warranty of
-#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-#
-# This script based on https://github.com/rocky/python-uncompyle6/blob/master/__pkginfo__.py
-#
 
 __all__ = ["extras_require"]