Don't build an assembly for the REPL

project/SparkBuild.scala

@@ -87,7 +87,7 @@ object SparkBuild extends Build {
   def replSettings = sharedSettings ++ Seq(
     name := "spark-repl",
     libraryDependencies <+= scalaVersion("org.scala-lang" % "scala-compiler" % _)
-  ) ++ assemblySettings ++ extraAssemblySettings
+  )
 
   def examplesSettings = sharedSettings ++ Seq(
     name := "spark-examples"