[liboobs] Remove wrong conditional check for ENABLE_GTK_DOC

[Milan Bouchet-Valat <milanbv src gnome org>]

commit 25e058a6ca7d1fbadcf13d8aa7a4e59c1206c75d
Author: Milan Bouchet-Valat <nalimilan club fr>
Date:   Mon Feb 15 21:02:54 2010 +0100

    Remove wrong conditional check for ENABLE_GTK_DOC
    
    This was not defined anywhere, but wouldn't fail all the time, causing headaches to the maintainer. 'make distcheck' should always be run after './autogen.sh --enable-gtk-doc', else it will fail, which is intended.

 doc/reference/Makefile.am |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)
---
diff --git a/doc/reference/Makefile.am b/doc/reference/Makefile.am
index 76b63c4..d829c72 100644
--- a/doc/reference/Makefile.am
+++ b/doc/reference/Makefile.am
@@ -48,12 +48,7 @@ content_files =	version.xml
 # Extra options to supply to gtkdoc-fixref.
 FIXXREF_OPTIONS=
 
-if ENABLE_GTK_DOC
 include $(top_srcdir)/gtk-doc.make
-else
-CLEANFILES =
-EXTRA_DIST =
-endif
 
 # Other files to distribute.
 EXTRA_DIST += version.xml.in