Remove references to Express v3

en/guide/migrating-5.md

@@ -112,9 +112,9 @@ The `res.sendfile()` function has been replaced by a camel-cased version `res.se
 
 <h4 id="app.router">app.router</h4>
 
-The `app.router` object, which was removed in Express 4, has made a comeback in Express 5. In the new version, this object is a just a reference to the base Express router, unlike in Express 3, where an app had to explicitly load it.
+The `app.router` object, which was removed in Express 4, has made a comeback in Express 5.
 
-The new version of the router contains **breaking changes** to the way paths are parsed due to an update in [paths-to-regexp from 0.1.7 to 6.2.0](https://github.com/pillarjs/path-to-regexp):
+The Express v5 [router](https://github.com/pillarjs/router) contains **breaking changes** to the way paths are parsed due to an update in [paths-to-regexp from 0.1.7 to 6.2.0](https://github.com/pillarjs/path-to-regexp):
 
 1. New `?`, `*`, and `+` parameter modifiers have been added. For example `/users/:user+` now matches `/users/1`, `/users/1/2`, etc. but not `/users`.
 2. The special `*` path segment behavior has been removed. This means that `*` is no longer a valid path and `/foo/*/bar` now matches a literal `'*'`. For the previous behaviour, a `(.*)` matching group should be used instead.