remove unused field in CompletionCandidate

Author: SethTisue

src/repl-frontend/scala/tools/nsc/interpreter/jline/Reader.scala

@@ -350,7 +350,7 @@ class Completion(delegate: shell.Completion) extends shell.Completion with Compl
     }
 
     val parsedLineWord = parsedLine.word()
-    result.candidates.filter(c => c.name == parsedLineWord || c.alias.fold(false)(a => a == parsedLineWord)) match {
+    result.candidates.filter(_.name == parsedLineWord) match {
       case Nil =>
       case exacts =>
         val declStrings = exacts.map(_.declString()).filterNot(_ == "")

src/repl/scala/tools/nsc/interpreter/Interface.scala

@@ -336,7 +336,6 @@ case class CompletionCandidate(
   isDeprecated: Boolean = false,
   isUniversal: Boolean = false,
   declString: () => String = () => "",
-  alias: Option[String] = None
 )
 object CompletionCandidate {
   sealed trait Arity