Add note about deprecation of _removeData and _data

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>

src/data.js

@@ -211,13 +211,8 @@ jQuery.extend({
		data_user.remove( elem, name );
	},

	// TODO: Replace all calls to _data and _removeData with direct
	// calls to
	//
	// data_priv.access( elem, name, data );
	//
	// data_priv.remove( elem, name );
	//
	// TODO: Now that all calls to _data and _removeData have been replaced
	// with direct calls to data_priv methods, these can be deprecated.
	_data: function( elem, name, data ) {
		return data_priv.access( elem, name, data );
	},