[gnome-todo] Remove dark-theme plugin

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 2781b454bc39ed88840a8162ec95a739b1e5f00e
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri Jul 2 14:00:25 2021 -0300

    Remove dark-theme plugin
    
    It'll be replaced by built-in functionality.

 src/plugins/dark-theme/dark-theme.gresource.xml |   6 --
 src/plugins/dark-theme/dark-theme.plugin        |  13 ---
 src/plugins/dark-theme/gtd-plugin-dark-theme.c  | 123 ------------------------
 src/plugins/dark-theme/gtd-plugin-dark-theme.h  |  36 -------
 src/plugins/dark-theme/meson.build              |  11 ---
 src/plugins/meson.build                         |   1 -
 6 files changed, 190 deletions(-)
---
diff --git a/src/plugins/meson.build b/src/plugins/meson.build
index 1e040a83..ea3be708 100644
--- a/src/plugins/meson.build
+++ b/src/plugins/meson.build
@@ -14,7 +14,6 @@ plugins_conf.set('VERSION', gnome_todo_version)
 
 subdir('all-tasks-panel')
 subdir('background')
-subdir('dark-theme')
 subdir('eds')
 subdir('inbox-panel')
 subdir('next-week-panel')