Remove forward declarations

Author: duncan3dc

ext/date/php_date.c

@@ -660,8 +660,6 @@ static HashTable *date_object_get_debug_info_timezone(zval *object, int *is_temp
 zval *date_interval_read_property(zval *object, zval *member, int type, void **cache_slot, zval *rv);
 void date_interval_write_property(zval *object, zval *member, zval *value, void **cache_slot);
 static zval *date_interval_get_property_ptr_ptr(zval *object, zval *member, int type, void **cache_slot);
-static zval *date_period_read_property(zval *object, zval *member, int type, void **cache_slot, zval *rv);
-static void date_period_write_property(zval *object, zval *member, zval *value, void **cache_slot);
 
 /* {{{ Module struct */
 zend_module_entry date_module_entry = {