[gtkmm] Remove tests/dialog

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 4199ff029ddca9965fafea43d7c5f4acb7a7f675
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Fri Apr 28 19:20:12 2017 +0200

    Remove tests/dialog
    
    Apart from unimportant formatting, tests/dialog/main.cc is identical to
    tests/delete_cpp_child/main.cc.

 tests/Makefile.am    |    2 -
 tests/dialog/main.cc |   54 --------------------------------------------------
 2 files changed, 0 insertions(+), 56 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index b6211f9..fce2d66 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -23,7 +23,6 @@ check_PROGRAMS =                      \
        child_widget2/test              \
        child_widget_managed/test       \
        delete_cpp_child/test           \
-       dialog/test                     \
        dialog_deletethis/test          \
        main_with_options/test          \
        menu_destruction/test           \
@@ -44,7 +43,6 @@ child_widget_test_SOURCES          = child_widget/main.cc     \
 child_widget2_test_SOURCES         = child_widget2/main.cc
 child_widget_managed_test_SOURCES  = child_widget_managed/main.cc
 delete_cpp_child_test_SOURCES      = delete_cpp_child/main.cc
-dialog_test_SOURCES                = dialog/main.cc
 dialog_deletethis_test_SOURCES     = dialog_deletethis/main.cc
 main_with_options_test_SOURCES     = main_with_options/main.cc
 menu_destruction_test_SOURCES      = menu_destruction/main.cc