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        | -


you mean paranthesis around the inner `&&`? i can do that if you think it helps.
where would you say what a valid router is? in the interface phpdoc?