[gtk/tests-cleanup] tests: Drop the visuals test

[Matthias Clasen <matthiasc src gnome org>]

commit fe6238d1c48d1a7a9844d3421001b120761e1e2e
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue May 12 15:56:46 2020 -0400

    tests: Drop the visuals test
    
    This was just a different way to load a ui file
    and try it with dark mode. This can be done
    with gtk-builder-tool preview and GTK_THEME.

 tests/meson.build                          |   2 -
 tests/visuals/level-bar.ui                 | 148 -------------------------
 tests/visuals/linked-buttons-horizontal.ui |  51 ---------
 tests/visuals/linked-buttons-vertical.ui   |  51 ---------
 tests/visuals/meson.build                  |   1 -
 tests/visuals/osd-toolbars.ui              | 168 -----------------------------
 tests/visuals/suggested-action-buttons.ui  |  80 --------------
 tests/visuals/visuals.c                    |  95 ----------------
 8 files changed, 596 deletions(-)
---
diff --git a/tests/meson.build b/tests/meson.build
index 7b9d76c732..3bcda9440c 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -153,5 +153,3 @@ if get_option('profiler')
   executable('testperf', 'testperf.c',
               dependencies: [profiler_dep, platform_gio_dep, libm])
 endif
-
-subdir('visuals')