ANDROID: db845c_gki.fragment: Remove DWC3 modules built into GKI

DWC3 was moved into GKI, so we need to drop the module
from our config fragment.

Fixes: 91632070 ("ANDROID: GKI: Enable CONFIG_USB_DWC3")
Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: I48226e3a4b0352722ac379804eb65348efcbaea9