[FIX] fix ethservice formatting

Author: KonradStaniec

src/main/scala/io/iohk/ethereum/jsonrpc/EthService.scala

@@ -34,7 +34,7 @@ import io.iohk.ethereum.jsonrpc.{FilterManager => FM}
 import monix.eval.Task
 import org.bouncycastle.util.encoders.Hex
 
-import scala.collection.concurrent.{ Map => ConcurrentMap, TrieMap }
+import scala.collection.concurrent.{Map => ConcurrentMap, TrieMap}
 import scala.concurrent.duration.FiniteDuration
 import scala.language.existentials
 import scala.reflect.ClassTag
@@ -532,9 +532,8 @@ class EthService(
 
   // NOTE This is called from places that guarantee we are running Ethash consensus.
   private def removeObsoleteHashrates(now: Date): Unit = {
-    hashRate.retain {
-      case (_, (_, reported)) =>
-        Duration.between(reported.toInstant, now.toInstant).toMillis < jsonRpcConfig.minerActiveTimeout.toMillis
+    hashRate.retain { case (_, (_, reported)) =>
+      Duration.between(reported.toInstant, now.toInstant).toMillis < jsonRpcConfig.minerActiveTimeout.toMillis
     }
   }