[gnome-builder/wip/gtk4-port] build: use sysprof GTK 4 branch

[Christian Hergert <chergert src gnome org>]

commit b4010ac99a5e804b9b64c8308a7a6b62f873204a
Author: Christian Hergert <chergert redhat com>
Date:   Tue Apr 19 16:48:24 2022 -0700

    build: use sysprof GTK 4 branch

 build-aux/flatpak/org.gnome.Builder.json | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/build-aux/flatpak/org.gnome.Builder.json b/build-aux/flatpak/org.gnome.Builder.json
index b08849a26..52df9d5a7 100644
--- a/build-aux/flatpak/org.gnome.Builder.json
+++ b/build-aux/flatpak/org.gnome.Builder.json
@@ -420,8 +420,7 @@
             "sources" : [
                 {
                     "type" : "git",
-                    "url" : "https://gitlab.gnome.org/GNOME/sysprof.git";,
-                    "branch" : "sysprof-3-44"
+                    "url" : "https://gitlab.gnome.org/GNOME/sysprof.git";
                 }
             ]
         },