[gnome-control-center/wip/jsparber/background] background: remove bg-source and bg-wallpapers-source files

[Julian Sparber <jsparber src gnome org>]

commit 6af4bd2e9e5bdc3cbeb6008310eab30a06ccffe7
Author: Julian Sparber <julian sparber net>
Date:   Tue Feb 6 22:43:26 2018 +0100

    background: remove bg-source and bg-wallpapers-source files

 panels/background/bg-source.c            |  202 ------------------------------
 panels/background/bg-source.h            |   46 -------
 panels/background/bg-wallpapers-source.c |  173 -------------------------
 panels/background/bg-wallpapers-source.h |   38 ------
 panels/background/meson.build            |    2 -
 5 files changed, 0 insertions(+), 461 deletions(-)
---
diff --git a/panels/background/meson.build b/panels/background/meson.build
index faa4483..64f55f9 100644
--- a/panels/background/meson.build
+++ b/panels/background/meson.build
@@ -58,8 +58,6 @@ common_sources += gnome.compile_resources(
 )
 
 sources = common_sources + files(
-  'bg-source.c',
-  'bg-wallpapers-source.c',
   'cc-background-item.c',
   'cc-background-grid-item.c',
   'cc-background-store.c',