Remove old -Ddri-drivers= option

Signed-off-by: Bernhard Rosenkränzer <bero@baylibre.com>

android/mesa3d_cross.mk

@@ -87,7 +87,6 @@ MESON_GEN_NINJA := \
 	-Dplatform-sdk-version=$(PLATFORM_SDK_VERSION)                               \
 	-Dandroid-stub=true                                                          \
 	-Dlmsensors=disabled                                                         \
-	-Ddri-drivers=                                                               \
 	-Dgallium-drivers=$(subst $(space),$(comma),$(BOARD_MESA3D_GALLIUM_DRIVERS)) \
 	-Dvulkan-drivers=$(subst $(space),$(comma),$(subst radeon,amd,$(BOARD_MESA3D_VULKAN_DRIVERS)))   \
 	-Dgbm=enabled                                                                \