wip Remove ListClass symbol from definitions

Author: anatoliykmetyuk

compiler/src/dotty/tools/dotc/core/Definitions.scala

@@ -396,8 +396,7 @@ class Definitions {
     methodNames.map(getWrapVarargsArrayModule.requiredMethod(_))
   })
 
-  @tu lazy val ListClass: ClassSymbol = ctx.requiredClass("scala.collection.immutable.List")
-  @tu lazy val ListModule: Symbol = ListClass.companionModule
+  @tu lazy val ListModule: Symbol = ctx.requiredModule("scala.collection.immutable.List")
   @tu lazy val NilModule: Symbol = ctx.requiredModule("scala.collection.immutable.Nil")
 
   @tu lazy val SingletonClass: ClassSymbol =