mesa-gl: Remove osmesa dependency

osmesa has been removed from recently upgrade mesa recipes
remove it from the fallback for non-x11 systems

(From OE-Core rev: 7ee8e99a52044e18cd35bde8d280274ce44e26d4)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/mesa/mesa-gl.bb

@@ -10,6 +10,6 @@ TARGET_CFLAGS = "-I${STAGING_INCDIR}/drm"
 
 # At least one DRI rendering engine is required to build mesa.
 # When no X11 is available, use osmesa for the rendering engine.
-PACKAGECONFIG ??= "opengl gallium ${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'x11', 'osmesa', d)}"
-PACKAGECONFIG:class-target = "opengl gallium ${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'x11', 'osmesa', d)}"
+PACKAGECONFIG ??= "opengl gallium ${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'x11', '', d)}"
+PACKAGECONFIG:class-target = "opengl gallium ${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'x11', '', d)}"