[gtk/wip/otte/listview] tests: Remove testtreemodel test

[Benjamin Otte <otte src gnome org>]

commit 1ff24c101f8a7e2df212ce00089d6fa7c1630d6c
Author: Benjamin Otte <otte redhat com>
Date:   Sun Nov 10 02:13:41 2019 +0100

    tests: Remove testtreemodel test
    
    testlistview does everything this test does.

 tests/meson.build         |   1 -
 tests/testtreelistmodel.c | 381 ----------------------------------------------
 2 files changed, 382 deletions(-)
---
diff --git a/tests/meson.build b/tests/meson.build
index 8d4a8e4a6c..2be5d96dae 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -110,7 +110,6 @@ gtk_tests = [
   ['teststack'],
   ['testrevealer'],
   ['testrevealer2'],
-  ['testtreelistmodel'],
   ['testsplitheaders'],
   ['teststackedheaders'],
   ['testwindowsize'],