Removed test case of Sub-selects in FROM (won't support).
Removed test case of Sub-selects in FROM (won't support).

hustnn/chana,hustnn/chana,wandoulabs/chana,wandoulabs/chana,matthewtt/chana,matthewtt/chana,wandoulabs/chana,matthewtt/chana,hustnn/chana,matthewtt/chana,wandoulabs/chana,hustnn/chana