Remove akka typed actor system implementation

The end goal for akka is to have a new runtime that can be optomoized
for typed actors. However to get the API production ready so it can
start getting adopted  it has been decided to only have adapted actor
systems initially.

Further discussion here: https://github.com/akka/akka/issues/24149

build.sbt

@@ -445,3 +445,11 @@ def akkaModule(name: String): Project =
     .settings(akka.AkkaBuild.defaultSettings)
     .settings(akka.Formatting.formatSettings)
     .enablePlugins(BootstrapGenjavadoc)
+
+lazy val typedTests = taskKey[Unit]("Runs all the typed tests")
+typedTests := {
+  (test in(actorTyped, Test)).value
+  (test in(actorTypedTests, Test)).value
+  (test in(clusterTyped, Test)).value
+  (test in(clusterShardingTyped, Test)).value
+}