Remove duplicate func info for array_key_first/last

Looks like this was already added in master separately...

Author: nikic

ext/opcache/Optimizer/zend_func_info.c

@@ -687,8 +687,6 @@ static const func_info_t func_infos[] = {
 	F1("array_replace_recursive",      MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_ANY | MAY_BE_ARRAY_OF_REF | MAY_BE_ARRAY_OF_ANY),
 	FN("array_keys",                   MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_LONG | MAY_BE_ARRAY_OF_LONG | MAY_BE_ARRAY_OF_STRING),
 	FN("array_values",                 MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_LONG | MAY_BE_ARRAY_OF_REF | MAY_BE_ARRAY_OF_ANY),
-	FN("array_key_first",              MAY_BE_NULL | MAY_BE_LONG | MAY_BE_STRING),
-	FN("array_key_last",               MAY_BE_NULL | MAY_BE_LONG | MAY_BE_STRING),
 	F1("array_count_values",           MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_ANY | MAY_BE_ARRAY_OF_LONG),
 	F1("array_column",                 MAY_BE_FALSE | MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_ANY | MAY_BE_ARRAY_OF_REF | MAY_BE_ARRAY_OF_ANY),
 	F1("array_reverse",                MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_ANY | MAY_BE_ARRAY_OF_REF | MAY_BE_ARRAY_OF_ANY),