refact: remove feature plugin-framework (#15854)

* refact: remove feature plugin-framework

Signed-off-by: fufesou <linlong1266@gmail.com>

* refact: remove unused translations

Signed-off-by: fufesou <linlong1266@gmail.com>

* fix: delete settings tab observable with correct type

Signed-off-by: fufesou <linlong1266@gmail.com>

---------

Signed-off-by: fufesou <linlong1266@gmail.com>

src/lang/kz.rs

@@ -483,9 +483,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Fingerprint", "Саусақ ізі"),
         ("Copy Fingerprint", "Саусақ ізін көшіру"),
         ("no fingerprints", "Саусақ іздері жоқ"),
-        ("Select a peer", "Пир таңдау"),
-        ("Select peers", "Пирлерді таңдау"),
-        ("Plugins", "Плагиндер"),
         ("Uninstall", "Жою"),
         ("Update", "Жаңарту"),
         ("Enable", "Қосу"),