Update repl/src/dotty/tools/repl/ReplDriver.scala

Co-authored-by: Jamie Thompson <[email protected]>

Author: lihaoyi

repl/src/dotty/tools/repl/ReplDriver.scala

@@ -341,7 +341,6 @@ class ReplDriver(settings: Array[String],
     res match {
       case parsed: Parsed if parsed.source.content().mkString.startsWith("//>") =>
         // Check for magic comments specifying dependencies
-        val sourceCode = parsed.source.content().mkString
         println("Please using `:dep com.example::artifact:version` to add dependencies in the REPL")
         state