task-xserver: Remove the recipe in favor of one from meta-oe

meta-oe also has a recipe task-x11-server_1.0.bb
which provides task-xserver as well and they are exactly same
see the diff below. This fixes the duplicate provider problem
when building systemd-gnome-image

-DESCRIPTION = "Task for a GNOME based image"
+DESCRIPTION = "Task for an image with Xserver"
 LICENSE = "MIT"
 LIC_FILES_CHKSUM =
"file://${COREBASE}/LICENSE;md5=3f40d7994397109285ec7b81fdeb3b58"
+PR = "r9"

 inherit task

+# for backwards compatibility
+RPROVIDES_${PN} += "task-xserver"
+
 XSERVER ?= "xserver-xorg \
            xf86-input-evdev \
            xf86-input-mouse \
@@ -17,4 +21,3 @@
 "

 PACKAGE_ARCH = "${MACHINE_ARCH}"
-

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>

recipes-angstrom/tasks/task-xserver.bb

@@ -1,20 +0,0 @@
-DESCRIPTION = "Task for a GNOME based image"
-LICENSE = "MIT"
-LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=3f40d7994397109285ec7b81fdeb3b58"
-
-inherit task
-
-XSERVER ?= "xserver-xorg \
-           xf86-input-evdev \
-           xf86-input-mouse \
-           xf86-video-fbdev \
-           xf86-input-keyboard \
-"
-
-
-RDEPENDS_${PN} = " \
-  ${XSERVER} \
-"
-
-PACKAGE_ARCH = "${MACHINE_ARCH}"
-