Revert "Fix typealias usage nullability and annotations lost in deserialization"

This reverts commit 070848a1

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/TypeDeserializer.kt

@@ -92,12 +92,8 @@ class TypeDeserializer(
         val declarationDescriptor = constructor.declarationDescriptor
 
         val simpleType = when {
-            expandTypeAliases && declarationDescriptor is TypeAliasDescriptor -> {
-                val expandedType = with(KotlinTypeFactory) { declarationDescriptor.computeExpandedType(arguments) }
-                expandedType
-                    .makeNullableAsSpecified(proto.nullable)
-                    .replaceAnnotations(Annotations.create(annotations + expandedType.annotations))
-            }
+            expandTypeAliases && declarationDescriptor is TypeAliasDescriptor ->
+                with(KotlinTypeFactory) { declarationDescriptor.computeExpandedType(arguments) }
             Flags.SUSPEND_TYPE.get(proto.flags) ->
                 createSuspendFunctionType(annotations, constructor, arguments, proto.nullable)
             else ->