linux-dmabuf: disable per-surface feedback

It seems like the wlr_scene implementation of sending per-surface
feedback is a bit too spammy and can lead to resource exhaustion in
clients in at least some reported cases.

river/Root.zig

@@ -120,8 +120,6 @@ pub fn init(self: *Self) !void {
     const scene = try wlr.Scene.create();
     errdefer scene.tree.node.destroy();
 
-    scene.setLinuxDmabufV1(server.linux_dmabuf);
-
     const interactive_content = try scene.tree.createSceneTree();
     const drag_icons = try scene.tree.createSceneTree();
     const hidden_tree = try scene.tree.createSceneTree();