Replace R.string.yes with R.string.ok

Android doesn't use yes/no but ok/cancel usually, so this should be done here, too

app/src/main/res/values-fa/strings.xml

@@ -109,7 +109,6 @@
     <string name="channels">کانال‌ها</string>
     <string name="playlists">سیاهه‌های پخش</string>
     <string name="users">کاربران</string>
-    <string name="yes">بله</string>
     <string name="disabled">غیرفعال</string>
     <string name="clear">پاک‌کردن</string>
     <string name="play_all">پخش همه</string>