drop DynamicRouter::match

This method is redundant to matchRequest but prone to information loss. See discussion in #105. The ChainRouter still has the match() method.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | yes
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #105
| License       | MIT
| Doc PR        | -


the interface was added in one of the RCs at the request of @dawehner (aka Drupal), so I assume we can easily change it now ..