Apply suggestion from @ioquatix

Author: ioquatix

lib/async/node.rb

@@ -297,8 +297,6 @@ def stop(later = false)
 
 		# Wait for this node to complete. By default, nodes cannot be waited on.
 		# Subclasses like Task override this method to provide waiting functionality.
-		#
-		# @returns [self] Returns self for method chaining.
 		def wait
 			nil
 		end