Revert PRUNE backoff period to default (#694)

CHANGELOG.md

@@ -1,5 +1,26 @@
 # Changelog
 
+## Next version
+
+This release contains the following:
+
+### Features
+
+### Changes
+
+- GossipSub [prune backoff period](https://github.com/libp2p/specs/blob/master/pubsub/gossipsub/gossipsub-v1.1.md#prune-backoff-and-peer-exchange) is now the recommended 1 minute
+
+#### General refactoring
+
+#### Docs
+
+#### Schema
+
+#### API
+
+
+### Fixes
+
 ## 2021-07-26 v0.5.1
 
 This patch release contains the following fix:

waku/v2/protocol/waku_relay.nim

@@ -54,11 +54,6 @@ method initPubSub*(w: WakuRelay) {.raises: [Defect, InitializationError].} =
   w.verifySignature = false
   w.sign = false
 
-  # Here we can fine-tune GossipSub params for our purposes
-  w.parameters = GossipSubParams.init()
-  # Setting pruneBackoff allows us to restart nodes and trigger a re-subscribe within reasonable time.
-  w.parameters.pruneBackoff = 30.seconds
-
   procCall GossipSub(w).initPubSub()
 
   w.init()