[i18n] Use redgettext over pygettext (#2023)

* [i18n] Use redgettext over pygettext

* Clear out autogenerated `messages.pot` files

* Remove redundant `regen_messages.py` files

* Refactor `generate_strings.py` to use redgettext

* Install redgettext in Travis Crowdin job

* Clean up some problematic usages of gettext function

* Reformat

* Replace generate_strings.py with Makefile argument

* Update to redgettext 2.1, use exclusion pattern

Signed-off-by: Toby Harradine <tobyharradine@gmail.com>

redbot/cogs/modlog/locales/messages.pot

@@ -1,61 +0,0 @@
-# SOME DESCRIPTIVE TITLE.
-# Copyright (C) YEAR ORGANIZATION
-# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
-#
-msgid ""
-msgstr ""
-"Project-Id-Version: PACKAGE VERSION\n"
-"POT-Creation-Date: 2018-02-18 14:42+AKST\n"
-"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
-"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
-"Language-Team: LANGUAGE <LL@li.org>\n"
-"MIME-Version: 1.0\n"
-"Content-Type: text/plain; charset=CHARSET\n"
-"Content-Transfer-Encoding: ENCODING\n"
-"Generated-By: pygettext.py 1.5\n"
-
-
-#: ../modlog.py:36
-msgid "Mod events will be sent to {}"
-msgstr ""
-
-#: ../modlog.py:42
-msgid "I do not have permissions to send messages in {}!"
-msgstr ""
-
-#: ../modlog.py:52
-msgid "Mod log deactivated."
-msgstr ""
-
-#: ../modlog.py:63
-msgid "Current settings:"
-msgstr ""
-
-#: ../modlog.py:75
-msgid "That action is not registered"
-msgstr ""
-
-#: ../modlog.py:82
-msgid "Case creation for {} actions is now {}."
-msgstr ""
-
-#: ../modlog.py:94
-msgid "Cases have been reset."
-msgstr ""
-
-#: ../modlog.py:103
-msgid "That case does not exist for that guild"
-msgstr ""
-
-#: ../modlog.py:122
-msgid "That case does not exist!"
-msgstr ""
-
-#: ../modlog.py:146
-msgid "You are not authorized to modify that case!"
-msgstr ""
-
-#: ../modlog.py:155
-msgid "Reason has been updated."
-msgstr ""
-

redbot/cogs/modlog/locales/regen_messages.py

@@ -1,11 +0,0 @@
-import subprocess
-
-TO_TRANSLATE = ["../modlog.py"]
-
-
-def regen_messages():
-    subprocess.run(["pygettext", "-n"] + TO_TRANSLATE)
-
-
-if __name__ == "__main__":
-    regen_messages()