Move content from akka-docs-new into akka-docs

Now the paradox documentation is no longer functional until we update akka-docs
to generate from paradox instead of sphinx

akka-docs-new/build.sbt

@@ -1,22 +0,0 @@
-import akka.{ AkkaBuild, Dependencies, Formatting }
-import akka.ValidatePullRequest._
-import com.typesafe.sbt.SbtScalariform.ScalariformKeys
-
-AkkaBuild.defaultSettings
-AkkaBuild.dontPublishSettings
-Formatting.docFormatSettings
-Dependencies.docs
-
-unmanagedSourceDirectories in ScalariformKeys.format in Test := (unmanagedSourceDirectories in Test).value
-//TODO: additionalTasks in ValidatePR += paradox in Paradox
-
-enablePlugins(ScaladocNoVerificationOfDiagrams)
-disablePlugins(MimaPlugin)
-enablePlugins(ParadoxPlugin)
-
-paradoxProperties ++= Map(
-  "extref.wikipedia.base_url" -> "https://en.wikipedia.org/wiki/%s",
-  "scala.version" -> scalaVersion.value,
-  "akka.version" -> version.value
-)
-paradoxTheme := Some(builtinParadoxTheme("generic"))

project/AkkaBuild.scala

@@ -265,19 +265,6 @@ object AkkaBuild extends Build {
     )
   )
 
-  lazy val newDocs = Project(
-     id = "akka-docs-new",
-     base = file("akka-docs-new"),
-     dependencies = Seq(
-        actor,
-        testkit % "compile;test->test",
-        remote % "compile;test->test", cluster, clusterMetrics, slf4j, agent, camel, osgi,
-        persistence % "compile;provided->provided;test->test", persistenceTck, persistenceQuery,
-        typed % "compile;test->test", distributedData,
-        stream, streamTestkit % "compile;test->test"
-     )
-  )
-
   lazy val contrib = Project(
     id = "akka-contrib",
     base = file("akka-contrib"),