Remove shebangs from py scripts

Starting with Fedora 30 and RHEL 8, ambiguous python shebangs will now
throw errors during the RPM build process instead of just warnings,
since these systems have moved to Python 3 by default, and Python 2 may
not be available in the future.

See [this
page](https://fedoraproject.org/wiki/Changes/Make_ambiguous_python_shebangs_error)
for more details.

Drop these shebangs as the scripts are only ever called from fish
wrappers.

share/tools/create_manpage_completions.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 # Run me like this: ./create_manpage_completions.py /usr/share/man/man{1,8}/* > man_completions.fish

share/tools/deroff.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 """ Deroff.py, ported to Python from the venerable deroff.c """

share/tools/web_config/webconfig.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-
 from __future__ import unicode_literals
 from __future__ import print_function
 import binascii