[gnome-builder] omni-gutter: remove dead code

[Christian Hergert <chergert src gnome org>]

commit 0f9c10f50ae7c312f5a4e0c9d5d0164a229b705b
Author: Christian Hergert <chergert redhat com>
Date:   Sat Apr 20 00:24:18 2019 -0700

    omni-gutter: remove dead code

 src/plugins/omni-gutter/fast-str.c  |   77 ---
 src/plugins/omni-gutter/fast-str.h  |   32 -
 src/plugins/omni-gutter/int-array.h | 1255 -----------------------------------
 src/plugins/omni-gutter/meson.build |    1 -
 4 files changed, 1365 deletions(-)
---
diff --git a/src/plugins/omni-gutter/meson.build b/src/plugins/omni-gutter/meson.build
index 36e8331e8..f3a623274 100644
--- a/src/plugins/omni-gutter/meson.build
+++ b/src/plugins/omni-gutter/meson.build
@@ -2,7 +2,6 @@ plugins_sources += files([
   'omni-gutter-plugin.c',
   'gbp-omni-gutter-renderer.c',
   'gbp-omni-gutter-editor-page-addin.c',
-  'fast-str.c',
 ])
 
 omni_gutter_resources = gnome.compile_resources(