[libpanel] animation: remove PanelAnimation

[Christian Hergert <chergert src gnome org>]

commit a6eaa096f0be7fd76e0db439b4d7d88f83ba4368
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jul 27 11:49:06 2022 -0700

    animation: remove PanelAnimation
    
    We don't use this anywhere currently so just drop it before we have to
    accidentally maintain it.

 src/meson.build          |    2 -
 src/panel-animation.c    | 1198 ----------------------------------------------
 src/panel-animation.h    |   72 ---
 src/panel-frame-source.c |  158 ------
 src/panel-frame-source.h |   34 --
 5 files changed, 1464 deletions(-)
---
diff --git a/src/meson.build b/src/meson.build
index 2d741dd..524233a 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -18,7 +18,6 @@ panel_version_h = configure_file(
   configuration: version_data)
 
 libpanel_sources = [
-  'panel-animation.c',
   'panel-binding-group.c',
   'panel-dock.c',
   'panel-dock-child.c',
@@ -28,7 +27,6 @@ libpanel_sources = [
   'panel-frame-header.c',
   'panel-frame-header-bar.c',
   'panel-frame-header-bar-row.c',
-  'panel-frame-source.c',
   'panel-frame-switcher.c',
   'panel-frame-tab-bar.c',
   'panel-grid.c',