[zenity] man: Remove mention of gdialog

[Piotr Drąg <piotrdrag src gnome org>]

commit a0d1d9abae1591a0354ea289230246c1956512f7
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Wed Sep 20 04:39:38 2017 +0200

    man: Remove mention of gdialog
    
    It’s been dead for a while.
    
    https://git.gnome.org/browse/archive/gnome-utils/commit/?id=c7259559145956d41615206747066da10fd92898

 data/zenity.1 |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/zenity.1 b/data/zenity.1
index feb85ed..06a1aba 100644
--- a/data/zenity.1
+++ b/data/zenity.1
@@ -415,4 +415,4 @@ find $HOME \-name '*.ps' | zenity \-\-progress \-\-pulsate
 This manual page was written by Ross Burton <ross burtonini com>.
 
 .SH SEE ALSO
-\fBgdialog\fP(1), \fBdialog\fP(1)
+\fBdialog\fP(1)