Remove unused method in Completion

Author: Duhemm

compiler/src/dotty/tools/dotc/interactive/Completion.scala

@@ -233,20 +233,6 @@ object Completion {
     (info.offset, completionList)
   }
 
-  /** Possible completions of members of `prefix` which are accessible when called inside `boundary` */
-  def completions(prefix: Type, boundary: Symbol)(implicit ctx: Context): List[Symbol] =
-    Interactive.safely {
-      if (boundary != NoSymbol) {
-        val boundaryCtx = ctx.withOwner(boundary)
-        def exclude(sym: Symbol) = sym.isAbsent || sym.is(Synthetic) || sym.is(Artifact)
-        def addMember(name: Name, buf: mutable.Buffer[SingleDenotation]): Unit =
-          buf ++= prefix.member(name).altsWith(sym =>
-            !exclude(sym) && sym.isAccessibleFrom(prefix)(boundaryCtx))
-          prefix.memberDenots(completionsFilter, addMember).map(_.symbol).toList
-      }
-      else Nil
-    }
-
   /** Filter for names that should appear when looking for completions. */
   private[this] object completionsFilter extends NameFilter {
     def apply(pre: Type, name: Name)(implicit ctx: Context): Boolean =