Disable node placement prediction for waterlily (#65)

It doesn't work well because of the special on_place.

flowers_plus/init.lua

@@ -63,6 +63,7 @@ for i in ipairs(lilies_list) do
 			fixed = { -0.5, -0.49, -0.5, 0.5, -0.49, 0.5 },
 		},
 		buildable_to = true,
+		node_placement_prediction = "",
 
 		liquids_pointable = true,
 		drop = "flowers:waterlily",