gnome-shell-extensions: Stop copying gnome-classic session to wayland

It was me who introduced gnome-classic for wayland in
342de9bf51.

In the commit message I wrote:
"Enable gnome-classic session for wayland
Wonder why upstream does not ship this: Session runs perfectly fine"

Seems upstream was listening :) With 42.0 they ship two wayland sessions but
now I do not understand why there are two: Sessions (Try)Exec are identical -
only displayed texts are different. Maybe it's for gdm's sake which I never
used so far.

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-gnome/recipes-gnome/gnome-shell/gnome-shell-extensions_42.0.bb

@@ -19,12 +19,6 @@ EXTRA_OEMESON += " \
     -Dclassic_mode=true \
 "
 
-do_install:append() {
-    # enable gnome-classic session for wayland
-    install -d ${D}${datadir}/wayland-sessions
-    install -m644 ${D}${datadir}/xsessions/gnome-classic.desktop ${D}${datadir}/wayland-sessions/
-}
-
 RDEPENDS:${PN} += "gnome-shell"
 
 FILES:${PN} += " \