In PHP 7, the entire TSRMLS macro love has been dropped.
In the rare event TSRMLS is needed, the old macros are not kosher, and have more or less all been defined as empty (for compatabilitiy).

However, TSRMLS_FETCH_FROM_CTX() still does assign tsrmls, but as we don't use it in PHP 7, it wind up unused and the compiler complains hiding more valuable warnings.