Translations update from Hosted Weblate

Co-authored-by: Constantin Piber <cp.piber@gmail.com>
Co-authored-by: EugeneCage <taskaev.evgeny1@gmail.com>
Co-authored-by: Hosted Weblate <hosted@weblate.org>
Co-authored-by: Nguyễn Trung Đức <vaicato16@gmail.com>
Co-authored-by: UnknownSkyrimPasserby <f7022961@opayq.com>
Co-authored-by: 清水汐音 <chenzhongjie19940725@gmail.com>
Translate-URL: https://hosted.weblate.org/projects/suwayomi/suwayomi-webui/
Translate-URL: https://hosted.weblate.org/projects/suwayomi/suwayomi-webui/de/
Translate-URL: https://hosted.weblate.org/projects/suwayomi/suwayomi-webui/pl/
Translate-URL: https://hosted.weblate.org/projects/suwayomi/suwayomi-webui/ru/
Translate-URL: https://hosted.weblate.org/projects/suwayomi/suwayomi-webui/vi/
Translate-URL: https://hosted.weblate.org/projects/suwayomi/suwayomi-webui/zh_Hans/
Translation: Suwayomi/Suwayomi-WebUI

public/locales/ja.json

@@ -117,7 +117,6 @@
                 }
             },
             "label": {
-                "open_on_source": "ソースで開く",
                 "select": "選択"
             }
         },
@@ -261,7 +260,6 @@
             "submit": "送信",
             "deselect": "選択解除",
             "latest": "最新",
-            "open_site": "サイトを開く",
             "refresh": "更新",
             "show_less": "表示を減らす",
             "show_more": "もっと表示",