directfb: remove BR2_PACKAGE_DIRECTFB_UNIQUE option

This option depends on BR2_UNIMPLEMENTED (which does not exist) since
2009. Since BR2_UNIMPLEMENTED does not exist, it was not possible to
enable BR2_PACKAGE_DIRECTFB_UNIQUE, which means that nobody cared
about making it available, and that we don't need to add any
Config.in.legacy handling to remove this option.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/directfb/Config.in

@@ -45,10 +45,6 @@ config BR2_PACKAGE_DIRECTFB_TRACE
 	help
 	  Enable call tracing for DirectFB applications
 
-config BR2_PACKAGE_DIRECTFB_UNIQUE
-	bool "enable unique window manager"
-	depends on BR2_UNIMPLEMENTED
-
 config BR2_PACKAGE_DIRECTFB_ATI128
 	bool "compile ati128 graphics driver"
 	depends on BR2_i386 || BR2_x86_64

package/directfb/directfb.mk

@@ -53,12 +53,6 @@ ifeq ($(BR2_PACKAGE_DIRECTFB_TRACE),y)
 DIRECTFB_CONF_OPTS += --enable-trace
 endif
 
-ifeq ($(BR2_PACKAGE_DIRECTFB_UNIQUE),y)
-DIRECTFB_CONF_OPTS += --enable-unique
-else
-DIRECTFB_CONF_OPTS += --disable-unique
-endif
-
 DIRECTFB_GFX = \
 	$(if $(BR2_PACKAGE_DIRECTFB_ATI128),ati128) \
 	$(if $(BR2_PACKAGE_DIRECTFB_CLE266),cle266) \