📚 docs(README): Remove WIP notice.

Author: make-github-pseudonymous-again

README.md

@@ -4,9 +4,6 @@
 Singly linked list for JavaScript.
 See [docs](https://data-structure-algebra.github.io/singly-linked-list/index.html).
 
-> :building_construction: Caveat emptor! This is work in progress. Code may be
-> working. Documentation may be present. Coherence may be. Maybe.
-
 > :warning: Depending on your environment, the code may require
 > `regeneratorRuntime` to be defined, for instance by importing
 > [regenerator-runtime/runtime](https://www.npmjs.com/package/regenerator-runtime).