i18n: Remove .tx/config, transifex-machine-translation-button.png.

Commit f22680da31 (#35043) should have
removed these.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

.tx/config

@@ -1,40 +0,0 @@
-# Migrated from transifex-client format with `tx migrate`
-#
-# See https://developers.transifex.com/docs/using-the-client which hints at
-# this format, but in general, the headings are in the format of:
-#
-# [o:<org>:p:<project>:r:<resource>]
-
-[main]
-host = https://www.transifex.com
-lang_map = zh-Hans: zh_Hans
-
-[o:zulip:p:zulip:r:djangopo]
-file_filter = locale/<lang>/LC_MESSAGES/django.po
-source_file = locale/en/LC_MESSAGES/django.po
-source_lang = en
-type = PO
-
-[o:zulip:p:zulip:r:mobile]
-file_filter = locale/<lang>/mobile.json
-source_file = locale/en/mobile.json
-source_lang = en
-type = KEYVALUEJSON
-
-[o:zulip:p:zulip:r:translationsjson]
-file_filter = locale/<lang>/translations.json
-source_file = locale/en/translations.json
-source_lang = en
-type = KEYVALUEJSON
-
-[o:zulip:p:zulip-test:r:djangopo]
-file_filter = locale/<lang>/LC_MESSAGES/django.po
-source_file = locale/en/LC_MESSAGES/django.po
-source_lang = en
-type = PO
-
-[o:zulip:p:zulip-test:r:translationsjson]
-file_filter = locale/<lang>/translations.json
-source_file = locale/en/translations.json
-source_lang = en
-type = KEYVALUEJSON