Drop unused code

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Drop unused code

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Drop unused code

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Delete *.build

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>