Not at all: unless a license is provided, the code is fully protected under copyright and you have _no_ rights to copy it or use it in _any_ way you want (unless falling under "fair use" clauses for the jurisdiction you're in/the author is in).

The opposite

no license[0] is the default fallback when nothing is provided. Realistically, it's "use at your own risk", because someone who doesn't license may not even be aware of what others do with it (or you fallback to whatever rules of the platform you posted on).

https://choosealicense.com/no-permission/

Uh, no, this is not how copyright law works.