Remove unused async_safe_traverse.

Author: ioquatix

lib/async/safe/class.rb

@@ -50,27 +50,4 @@ def async_safe?(method = nil)
 	def async_safe!(value = true)
 		self.const_set(:ASYNC_SAFE, value)
 	end
-	
-	# Define how to traverse this object's children during ownership transfer.
-	#
-	# This method is called by `Async::Safe.transfer` to recursively transfer
-	# ownership of contained objects. By default, only the object itself is transferred.
-	# Define this method to enable deep transfer for collection-like classes.
-	#
-	# @parameter instance [Object] The instance to traverse.
-	# @parameter block [Proc] Block to call for each child object that should be transferred.
-	#
-	# ~~~ ruby
-	# class MyContainer
-	#   async_safe!(false)
-	#   attr_reader :children
-	#   
-	#   def self.async_safe_traverse(instance, &block)
-	#     instance.children.each(&block)
-	#   end
-	# end
-	# ~~~
-	def async_safe_traverse(instance, &block)
-		# Default: no traversal (shallow transfer only)
-	end
 end