Revert "lib: add `WeakRef` and `FinalizationRegistry` to `primordials`"

Initially opening as a test to see if this fixes our actions runs.

Refs:

• https://github.com/nodejs/node/issues/38040#issuecomment-819498243
• https://github.com/nodejs/node/runs/2332565053

---

This reverts commit 78343bbd.