Remove example X11 config

Same as with the pulseaudio configs: They are not needed and the setup script even
asks if you want to delete them.

Signed-off-by: Dorian Stoll <dorian.stoll@tmsp.io>

root/etc/X11/xorg.conf.d/20-intel_example.conf

@@ -1,7 +0,0 @@
-#Section "Device"
-#   Identifier  "Intel Graphics"
-#   Driver      "intel"
-#   Option      "TripleBuffer" "true"
-#   Option      "TearFree"     "true"
-#   Option      "DRI"          "true"
-#EndSection