Remove unnecessary lightdm patch

stage3/01-tweaks/00-patches/01-lightdm.diff

@@ -1,13 +0,0 @@
-Index: jessie-stage3/rootfs/etc/lightdm/lightdm-gtk-greeter.conf
-===================================================================
---- jessie-stage3.orig/rootfs/etc/lightdm/lightdm-gtk-greeter.conf
-+++ jessie-stage3/rootfs/etc/lightdm/lightdm-gtk-greeter.conf
-@@ -16,7 +16,7 @@
- # screensaver-timeout = Timeout (in seconds) until the screen blanks when the greeter is called as lockscreen
- # 
- [greeter]
--background=/usr/share/images/desktop-base/login-background.svg
-+background=#ffffff
- theme-name=Adwaita
- #icon-theme-name=
- #font-name=

stage3/01-tweaks/00-patches/series

@@ -1 +0,0 @@
-01-lightdm.diff