shellMountOperation: Remove unused volume monitor

It seems to have never been used since 6b5f9a647a, the commit that
introduced it.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2021>

diff --git a/js/ui/shellMountOperation.js b/js/ui/shellMountOperation.js
index 2956c0e967e91304380e1b8090506ce4c97138bc..d0d03491ff820776cbbecb0d4fc3c078661134a1 100644 (file)
--- a/js/ui/shellMountOperation.js
+++ b/js/ui/shellMountOperation.js
@@ -542,7 +542,6 @@ var GnomeShellMountOpHandler = class {
                                        Gio.BusNameOwnerFlags.REPLACE, null, null);
 
         this._dialog = null;
-        this._volumeMonitor = Gio.VolumeMonitor.get();
 
         this._ensureEmptyRequest();
     }