[gnome-builder] color-picker: remove old workbench addin

[Christian Hergert <chergert src gnome org>]

commit 5ceb691bb27b156f4c55c539301488c3fee1e748
Author: Christian Hergert <chergert redhat com>
Date:   Fri Jul 14 19:21:58 2017 -0700

    color-picker: remove old workbench addin
    
    This won't bee needed going forward.

 .../gb-color-picker-workbench-addin-private.h      |   44 --
 .../color-picker/gb-color-picker-workbench-addin.c |  525 --------------------
 .../color-picker/gb-color-picker-workbench-addin.h |   32 --
 plugins/color-picker/meson.build                   |    3 -
 4 files changed, 0 insertions(+), 604 deletions(-)
---
diff --git a/plugins/color-picker/meson.build b/plugins/color-picker/meson.build
index da7e129..62cadfc 100644
--- a/plugins/color-picker/meson.build
+++ b/plugins/color-picker/meson.build
@@ -21,9 +21,6 @@ color_picker_sources = [
   'gb-color-picker-prefs-palette-row.c',
   'gb-color-picker-prefs-palette-row.h',
   'gb-color-picker-private.h',
-  'gb-color-picker-workbench-addin.c',
-  'gb-color-picker-workbench-addin.h',
-  'gb-color-picker-workbench-addin-private.h',
   color_picker_resources[0],
 ]