package/vulkan-tools: drop directfb support

As we're about to remove the DirectFB package, let's drop DirectFB
support in vulkan-tools.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/vulkan-tools/vulkan-tools.mk

@@ -17,14 +17,8 @@ VULKAN_TOOLS_CONF_OPTS += \
 	-DBUILD_CUBE=OFF \
 	-DBUILD_ICD=OFF \
 	-DBUILD_VULKANINFO=ON \
-	-DINSTALL_ICD=OFF
-
-ifeq ($(BR2_PACKAGE_DIRECTFB),y)
-VULKAN_TOOLS_DEPENDENCIES += directfb
-VULKAN_TOOLS_CONF_OPTS += -DBUILD_WSI_DIRECTFB_SUPPORT=ON
-else
-VULKAN_TOOLS_CONF_OPTS += -DBUILD_WSI_DIRECTFB_SUPPORT=OFF
-endif
+	-DINSTALL_ICD=OFF \
+	-DBUILD_WSI_DIRECTFB_SUPPORT=OFF
 
 ifeq ($(BR2_PACKAGE_LIBXCB),y)
 VULKAN_TOOLS_DEPENDENCIES += libxcb