SCALA-463 Create unique scala_libraries_4 module

Author: Matteo Di Pirro

build.sbt

@@ -299,12 +299,7 @@ lazy val scala_libraries_4 = (project in file("scala-libraries-4"))
   .settings(
     name := "scala-libraries-4",
     libraryDependencies += "com.lihaoyi" %% "utest" % "0.8.1" % "test",
-    testFrameworks += new TestFramework("utest.runner.Framework")
-  )
-
-lazy val scala_libraries_4 = (project in file("scala-libraries-4"))
-  .settings(
-    name := "scala-libraries",
+    testFrameworks += new TestFramework("utest.runner.Framework"),
     libraryDependencies += "org.scalatest" %% "scalatest" % "3.1.2" % Test,
     libraryDependencies ++= Seq(
       "org.scala-lang.modules" %% "scala-async" % "1.0.1",