mesa3d-headers: remove installation of OpenVG headers

OpenVG support has been completely removed from mesa3d in commit
3acd7a34ab05b87521b74f626ec637e7fdcc6595, merged in mesa-10.6.0.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/mesa3d-headers/mesa3d-headers.mk

@@ -62,10 +62,6 @@ ifeq ($(BR2_PACKAGE_HAS_LIBGLES),y)
 MESA3D_HEADERS_DIRS += GLES GLES2
 endif
 
-ifeq ($(BR2_PACKAGE_HAS_LIBOPENVG),y)
-MESA3D_HEADERS_DIRS += VG
-endif
-
 define MESA3D_HEADERS_BUILD_CMDS
 	$(MESA3D_HEADERS_BUILD_DRI_PC)
 endef