Link index-futures.md and index-network.md (#23331)

akka-docs/src/main/paradox/java/index-futures.md

@@ -1,10 +0,0 @@
-# Futures and Agents
-
-@@toc { depth=2 }
-
-@@@ index
-
-* [futures](futures.md)
-* [agents](agents.md)
-
-@@@

akka-docs/src/main/paradox/java/index-futures.md

@@ -0,0 +1 @@
+../scala/index-futures.md

akka-docs/src/main/paradox/java/index-network.md

@@ -1,23 +0,0 @@
-# Networking
-
-@@toc { depth=2 }
-
-@@@ index
-
-* [common/cluster](common/cluster.md)
-* [cluster-usage](cluster-usage.md)
-* [cluster-singleton](cluster-singleton.md)
-* [distributed-pub-sub](distributed-pub-sub.md)
-* [cluster-client](cluster-client.md)
-* [cluster-sharding](cluster-sharding.md)
-* [cluster-metrics](cluster-metrics.md)
-* [distributed-data](distributed-data.md)
-* [remoting](remoting.md)
-* [remoting-artery](remoting-artery.md)
-* [serialization](serialization.md)
-* [io](io.md)
-* [io-tcp](io-tcp.md)
-* [io-udp](io-udp.md)
-* [camel](camel.md)
-
-@@@

akka-docs/src/main/paradox/java/index-network.md

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+../scala/index-network.md