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-ur/strings.xml

@@ -92,7 +92,6 @@
     <string name="downloads_title">ڈاؤن لوڈز</string>
     <string name="error_report_title">خرابی کی اطلاع</string>
     <string name="all">تمام</string>
-    <string name="yes">ہاں</string>
     <string name="disabled">غیر فعال</string>
     <string name="clear">صاف</string>
     <string name="best_resolution">بہترین ریزولوشن</string>