Is there a JVM lacking garbage collector?

Question

There was a comment in the question calling-system-gc-explicitly stating that "You can not "force" a generic JVM to do garbage collection because a garbage collector is not actually required by the JVM spec.". My question is if there's such a JVM (and how and where does it get used, if so).

Answer 1

For instance, JavaCard's JVM lacked garbage collection until v3.