[libwnck] doc: Remove --nogtkinit because it is no longer accepted

[Marco Trevisan <marcotrevi src gnome org>]

commit 2cff39ce088b6ae62597a2a7b9c7cb3cb050ea43
Author: Ting-Wei Lan <lantw src gnome org>
Date:   Sun May 21 03:15:03 2017 +0800

    doc: Remove --nogtkinit because it is no longer accepted
    
    gtkdoc-scangobj --nogtkinit has been deprecated for a long time, and
    this option is removed during the conversion to python.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=782883

 doc/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/doc/Makefile.am b/doc/Makefile.am
index fd2ba13..6671d35 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -11,7 +11,7 @@ DOC_MAIN_SGML_FILE=libwnck-docs.sgml
 DOC_SOURCE_DIR=../libwnck
 
 # Extra options to pass to gtkdoc-scangobj
-SCANGOBJ_OPTIONS=--nogtkinit
+SCANGOBJ_OPTIONS=
 
 # Extra options to supply to gtkdoc-scan
 SCAN_OPTIONS=--deprecated-guards="WNCK_DISABLE_DEPRECATED"