kmscube: Upgrade to the latest revision

Upgrade to the latest revision and remove the patch because the
original problem has already been fixed upstream by kmscube
commit 311eaaaa473d ("kmscube: gears: use only GLES2").

Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

Author: Fabio Estevam

meta/recipes-graphics/kmscube/kmscube/0001-cube-gears-Change-header-file-to-GLES3-gl3.h.patch

@@ -10,9 +10,8 @@ DEPENDS = "virtual/libgles3 virtual/libgles2 virtual/egl libdrm virtual/libgbm"
 
 LIC_FILES_CHKSUM = "file://kmscube.c;beginline=1;endline=23;md5=8b309d4ee67b7315ff7381270dd631fb"
 
-SRCREV = "b2f97f53e01e07a920761e5d3e3ba22898b794a4"
+SRCREV = "311eaaaa473d593c30d118799aa19ac4ad53cd65"
 SRC_URI = "git://gitlab.freedesktop.org/mesa/kmscube;branch=master;protocol=https \
-           file://0001-cube-gears-Change-header-file-to-GLES3-gl3.h.patch \
            "
 
 UPSTREAM_CHECK_COMMITS = "1"