[devhelp] Remove #include "dh-language.h" from devhelp.h

[Sébastien Wilmet <swilmet src gnome org>]

commit b1e6d520977b0d9b096dd6044bee13e7024decca
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Wed May 3 18:47:03 2017 +0200

    Remove #include "dh-language.h" from devhelp.h
    
    DhLanguage is now private.

 src/devhelp.h |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/src/devhelp.h b/src/devhelp.h
index ac1b967..97b04c6 100644
--- a/src/devhelp.h
+++ b/src/devhelp.h
@@ -24,7 +24,6 @@
 /* Explicitly include all the exported headers */
 #include "dh-assistant-view.h"
 #include "dh-book-manager.h"
-#include "dh-language.h"
 #include "dh-book.h"
 #include "dh-book-tree.h"
 #include "dh-keyword-model.h"