[gnome-shell] Revert "shell: Fix pixbuf reference leak saving screenshots"

[Marge Bot <marge-bot src gnome org>]

commit 2d589ec36502914fd1791046b1235e6bff91d7e6
Author: msizanoen1 <msizanoen qtmlabs xyz>
Date:   Mon Aug 29 21:53:33 2022 +0700

    Revert "shell: Fix pixbuf reference leak saving screenshots"
    
    This reverts commit f5754adb681d55e985147b56de9c2b30c8cbc9f1 in
    accordance with https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2449#note_1539435.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2452>

 src/shell-screenshot.c | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/src/shell-screenshot.c b/src/shell-screenshot.c
index c173dd5d8e..fcf2da2365 100644
--- a/src/shell-screenshot.c
+++ b/src/shell-screenshot.c
@@ -1061,7 +1061,6 @@ composite_to_stream_on_png_saved (GObject      *pixbuf,
   else
     g_task_return_pointer (task, g_object_ref (pixbuf), g_object_unref);
 
-  g_object_unref (pixbuf);
   g_object_unref (task);
 }