[gimp] app: fix function doc-comment.

[Jehan Pagès <jehanp src gnome org>]

commit 5a8033151f1e89a1b954ee36c403c6a6fb1a9b82
Author: Jehan <jehan girinstud io>
Date:   Wed Oct 11 00:29:19 2017 +0200

    app: fix function doc-comment.
    
    Remove a sentence which does not apply to this function. Bad copy-paste.

 app/config/gimplangrc.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/app/config/gimplangrc.c b/app/config/gimplangrc.c
index c33e5a5..0a7f8c7 100644
--- a/app/config/gimplangrc.c
+++ b/app/config/gimplangrc.c
@@ -272,8 +272,6 @@ gimp_lang_rc_new (GFile    *system_gimprc,
  * @lang_rc:  a #GimpLangRc object.
  *
  * This function looks up the language set in `gimprc`.
- * If no language property is found, the list of unknown tokens
- * attached to the @rc object is searched.
  *
  * Return value: a newly allocated string representing the language or
  *               %NULL if the key couldn't be found.