bpo-39361: Document the removal of PyTypeObject.tp_print (GH-18125)

bpo-39361: Document the removal of PyTypeObject.tp_print (GH-18125) · python/cpython@2d50976

Original file line number	Diff line number	Diff line change
`@@ -323,6 +323,11 @@ Build and C API Changes`
`323`	`323`	`removed in Python 3.3.`
`324`	`324`	(Contributed by Victor Stinner in :issue:`38896`.)
`325`	`325`
	`326`	+* The ``tp_print`` slot of :ref:`PyTypeObject <type-structs>` has been removed.
	`327`	`+ It was used for printing objects to files in Python 2.7 and before. Since`
	`328`	`+ Python 3.0, it has been ignored and unused.`
	`329`	+ (Contributed by Jeroen Demeyer in :issue:`36974`.)
	`330`	`+`
`326`	`331`
`327`	`332`	`Deprecated`
`328`	`333`	`==========`