meson: remove wayland-protocol 1.39 check from top level meson.build

We do this check inside video/out/meson.build, and the subdirectory is
included before this already

meson.build

@@ -1030,12 +1030,7 @@ if features['wayland']
     subdir(join_paths('video', 'out'))
 endif
 
-foreach v: ['1.39']
-    features += {'wayland-protocols-' + v.replace('.', '-'):
-        wayland['deps'][2].version().version_compare('>=' + v)}
-endforeach
-
-if features['wayland-protocols-1-39']
+if features['wayland'] and features['wayland-protocols-1-39']
     sources += files('player/clipboard/clipboard-wayland.c')
 endif
 

player/clipboard/clipboard.c

@@ -40,7 +40,7 @@ static const struct clipboard_backend *const clipboard_backend_list[] = {
 #if HAVE_COCOA
     &clipboard_backend_mac,
 #endif
-#if HAVE_WAYLAND_PROTOCOLS_1_39
+#if HAVE_WAYLAND && HAVE_WAYLAND_PROTOCOLS_1_39
     &clipboard_backend_wayland,
 #endif
     &clipboard_backend_vo,