wayland protocol build: remove client protocols we do not use

Only include client protocols that we use on the client side.
Since these are not installed, there should not be any change
with this.
Testers - please note 'ninja -C build clean' does not remove
the old headers, you need to start from a new directory.

protocol/meson.build

@@ -32,12 +32,8 @@ protocols = [
 
 client_protocols = [
 	[wl_protocol_dir, 'unstable/xdg-shell/xdg-shell-unstable-v6.xml'],
-	[wl_protocol_dir, 'stable/xdg-shell/xdg-shell.xml'],
-	'gamma-control.xml',
-	'gtk-primary-selection.xml',
 	'idle.xml',
 	'screenshooter.xml',
-	'server-decoration.xml',
 ]
 
 wl_protos_src = []