[gtk+] tests: Remove testselection

[Benjamin Otte <otte src gnome org>]

commit 53081bd1d831797ebc873eab3c644c9d307ec6ef
Author: Benjamin Otte <otte redhat com>
Date:   Wed Dec 13 19:40:24 2017 +0100

    tests: Remove testselection
    
    With selections goig away, this test is not very useful anymore.

 tests/meson.build     |    1 -
 tests/testselection.c |  455 -------------------------------------------------
 2 files changed, 0 insertions(+), 456 deletions(-)
---
diff --git a/tests/meson.build b/tests/meson.build
index 5db73a6..11f5ce2 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -74,7 +74,6 @@ gtk_tests = [
   ['testrecentchooser'],
   ['testrecentchoosermenu'],
   ['testscale'],
-  ['testselection'],
   ['testselectionmode'],
   ['testspinbutton'],
   ['testtoolbar'],