MdeModulePkg/SataControllerDxe: Remove useless null check

ASSERT (Private != NULL) already covers this check.
See commit 81310a6.

Signed-off-by: Pedro Falcato <pedro.falcato@gmail.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
1 file changed