docs(kitsu-core): remove node 12 notice

Author: wopian

packages/kitsu-core/README.md

@@ -40,12 +40,10 @@
 
 |       Package | Package<br> Size\* | Node | Chrome | Firefox | Safari | Edge |
 | ------------: | :----------------: | :--: | :----: | :-----: | :----: | :--: |
-| `kitsu-core`† |      ≤ 1.4 kb      |  10+ |   79+  |   68+   |  12.1+ |  18+ |
+| `kitsu-core`  |      ≤ 1.4 kb      |  10+ |   79+  |   68+   |  12.1+ |  18+ |
 
 \* Including all dependencies, minified & gzipped<br>
 
-† [Changes in Node 12][node12esm] and newer require the full path to be used if using ES Modules: `kitsu-core/index.mjs`
-
 ## Install
 
 ### Yarn / NPM
@@ -526,5 +524,3 @@ All code released under [MIT]
 [contributing]: https://github.com/wopian/kitsu/blob/master/CONTRIBUTING.md
 
 [mit]: https://github.com/wopian/kitsu/blob/master/LICENSE.md
-
-[node12esm]: http://2ality.com/2019/04/nodejs-esm-impl.html#es-modules-on-npm