Revert "Add type info for spl_autoload_register"

This reverts commit ad72872.

Revert the change for now, probably needs better handling with account to BC
or joined with exceptions-in-engine RFC.

Author: smalyshev

ext/spl/php_spl.c

@@ -866,7 +866,7 @@ ZEND_BEGIN_ARG_INFO_EX(arginfo_spl_autoload_call, 0, 0, 1)
 ZEND_END_ARG_INFO()
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_spl_autoload_register, 0, 0, 0)
-	ZEND_ARG_TYPE_INFO(0, autoload_function, IS_CALLABLE, 0)
+	ZEND_ARG_INFO(0, autoload_function)
 	ZEND_ARG_INFO(0, throw)
 	ZEND_ARG_INFO(0, prepend)
 ZEND_END_ARG_INFO()