Actually, I just removed this package (along with xserver-xorg-input-all). Touchpad continues to work as normal using libinput driver.
- Bug#827702: GNOME doesn't support Synaptics driver anymore, m... Ian McKellar
- Bug#827702: GNOME doesn't support Synaptics driver anymo... Steve Clark
- Bug#827702: GNOME doesn't support Synaptics driver anymo... Steve Clark