Update translation files

Updated by "Cleanup translation files" hook in Weblate.

Translation: Element Call/element-call
Translate-URL: https://translate.element.io/projects/element-call/element-call/

public/locales/ja/app.json

@@ -68,7 +68,6 @@
   "Settings": "設定",
   "Sending…": "送信しています…",
   "Sending debug logs…": "デバッグログを送信しています…",
-  "Save": "保存",
   "Return to home screen": "ホーム画面に戻る",
   "Registering…": "登録しています…",
   "Register": "登録",