TempClassInfo#finalize: remove selfInfo parameter

It turns out that in practice we always use the same selfInfo that was
used to create the TempClassInfo, so no need to pass it again as a
parameter.

Author: smarter

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

@@ -4043,7 +4043,7 @@ object Types {
   extends CachedClassInfo(prefix, cls, Nil, decls, selfInfo) {
 
     /** Install classinfo with known parents in `denot` s */
-    def finalize(denot: SymDenotation, parents: List[Type], selfInfo: TypeOrSymbol)(implicit ctx: Context): Unit =
+    def finalize(denot: SymDenotation, parents: List[Type])(implicit ctx: Context): Unit =
       denot.info = ClassInfo(prefix, cls, parents, decls, selfInfo)
 
     override def derivedClassInfo(prefix: Type)(implicit ctx: Context): ClassInfo =

compiler/src/dotty/tools/dotc/core/unpickleScala2/Scala2Unpickler.scala

@@ -134,7 +134,7 @@ object Scala2Unpickler {
     else
       registerCompanionPair(scalacCompanion, denot.classSymbol)
 
-    tempInfo.finalize(denot, normalizedParents, ost) // install final info, except possibly for typeparams ordering
+    tempInfo.finalize(denot, normalizedParents) // install final info, except possibly for typeparams ordering
     denot.ensureTypeParamsInCorrectOrder()
   }
 }

compiler/src/dotty/tools/dotc/typer/Namer.scala

@@ -1144,7 +1144,7 @@ class Namer { typer: Typer =>
         original.putAttachment(Deriver, deriver)
       }
 
-      tempInfo.finalize(denot, parentTypes, selfInfo)
+      tempInfo.finalize(denot, parentTypes)
 
       Checking.checkWellFormed(cls)
       if (isDerivedValueClass(cls)) cls.setFlag(Final)