[gtk] tests: Remove flicker test

[Matthias Clasen <matthiasc src gnome org>]

commit 09361e76659bd1951a222cd64537abacc6a6f44a
Author: Timm Bäder <mail baedert org>
Date:   Wed Dec 26 07:45:31 2018 +0100

    tests: Remove flicker test
    
    gtk+ hasn't been flickering in ages so this test isn't very useful.

 tests/flicker.c   | 214 ------------------------------------------------------
 tests/meson.build |   1 -
 2 files changed, 215 deletions(-)
---
diff --git a/tests/meson.build b/tests/meson.build
index a6d6350662..1b32ce7c81 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -10,7 +10,6 @@ gtk_tests = [
   ['scrolling-performance', ['frame-stats.c', 'variable.c']],
   ['blur-performance', ['../gsk/gskcairoblur.c']],
   ['simple'],
-  ['flicker'],
   ['print-editor'],
   ['video-timer', ['variable.c']],
   ['testaccel'],