piglit: drop python3-six dependency

six was dropped as a dependency five years ago:
https://gitlab.freedesktop.org/mesa/piglit/-/commit/288e7b3b74a88e5cfa6a7fe26d52bf093e16365f

Signed-off-by: Guðni Már Gilbert <gudni.m.g@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>

Author: gudnimg

meta/recipes-graphics/piglit/piglit_git.bb

@@ -25,7 +25,7 @@ S = "${WORKDIR}/git"
 X11_DEPS = "${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'virtual/libx11 libxrender libglu', '', d)}"
 X11_RDEPS = "${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'mesa-demos', '', d)}"
 
-DEPENDS = "libpng waffle libxkbcommon python3-mako-native python3-numpy-native python3-six-native virtual/egl"
+DEPENDS = "libpng waffle libxkbcommon python3-mako-native python3-numpy-native virtual/egl"
 
 inherit cmake pkgconfig python3native features_check bash-completion
 
@@ -64,7 +64,7 @@ INHIBIT_PACKAGE_DEBUG_SPLIT = "1"
 RDEPENDS:${PN} = "waffle waffle-bin python3 python3-mako python3-json \
 	python3-misc \
 	python3-unixadmin python3-xml python3-multiprocessing \
-	python3-six python3-shell python3-io \
+        python3-shell python3-io \
 	python3-netserver bash \
 	"