[gnome-builder] internal: remove unused header

[Christian Hergert <chergert src gnome org>]

commit a3cbfd2eb36e70ea0c1e1e0d3bafc8d5cb1d0d89
Author: Christian Hergert <chergert redhat com>
Date:   Thu Oct 27 18:14:32 2016 -0700

    internal: remove unused header

 libide/ide-internal.h |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/libide/ide-internal.h b/libide/ide-internal.h
index 14f9d97..6dd1705 100644
--- a/libide/ide-internal.h
+++ b/libide/ide-internal.h
@@ -23,7 +23,6 @@
 
 #include "ide-types.h"
 
-#include "diagnostics/ide-diagnostic.h"
 #include "highlighting/ide-highlight-engine.h"
 #include "history/ide-back-forward-item.h"
 #include "history/ide-back-forward-list.h"