Revert "Translations update from Mattermost Weblate" (#19651)

* Revert "Translated using Weblate (Polish)"

This reverts commit 5aee5b3632.

* Revert "Translated using Weblate (Hungarian)"

This reverts commit 4ad13d21f5.

* Revert "Translated using Weblate (Portuguese (Brazil))"

This reverts commit 986cf9a439.

* Revert "Translated using Weblate (Italian)"

This reverts commit 0398e34f4b.

* Revert "Translated using Weblate (Turkish)"

This reverts commit c8e8a4a2ac.

* Revert "Translated using Weblate (German)"

This reverts commit 86c2680d02.

* Revert "Translated using Weblate (English (Australia))"

This reverts commit 5709e6c564.

i18n/it.json

@@ -7138,13 +7138,5 @@
   {
     "id": "api.admin.ldap.not_available.app_error",
     "translation": "LDAP non è disponibile."
-  },
-  {
-    "id": "api.admin.add_certificate.parseform.app_error",
-    "translation": "Errore nell'analisi della richiesta di tipo multiform"
-  },
-  {
-    "id": "Channels",
-    "translation": "Canali"
   }
 ]