fixed master (#6465)

* fixed master

* Revert "Merge pull request #6370 from paritytech/light-poa"

This reverts commit 3c60f99def, reversing
changes made to b731ccea18.

ethcore/light/src/net/request_set.rs

@@ -139,7 +139,6 @@ fn compute_timeout(reqs: &Requests) -> Duration {
 			Request::Storage(_) => timeout::PROOF,
 			Request::Code(_) => timeout::CONTRACT_CODE,
 			Request::Execution(_) => timeout::TRANSACTION_PROOF,
-			Request::Signal(_) => timeout::EPOCH_SIGNAL,
 		}
 	}))
 }