Cleanup RC deprecations in compiler and plugin.

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

@@ -49,7 +49,7 @@ class AnnotationDeserializer(private val module: ModuleDescriptor) {
         if (proto.argumentCount != 0 && !ErrorUtils.isError(annotationClass) && DescriptorUtils.isAnnotationClass(annotationClass)) {
             val constructor = annotationClass.constructors.singleOrNull()
             if (constructor != null) {
-                val parameterByName = constructor.valueParameters.toMapBy { it.name }
+                val parameterByName = constructor.valueParameters.associateBy { it.name }
                 arguments = proto.argumentList.map { resolveArgument(it, parameterByName, nameResolver) }.filterNotNull().toMap()
             }
         }

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/descriptors/DeserializedClassDescriptor.kt

@@ -287,7 +287,7 @@ class DeserializedClassDescriptor(
     }
 
     private inner class EnumEntryClassDescriptors {
-        private val enumEntryProtos = classProto.enumEntryList.toMapBy { c.nameResolver.getName(it.name) }
+        private val enumEntryProtos = classProto.enumEntryList.associateBy { c.nameResolver.getName(it.name) }
         private val protoContainer =
                 ProtoContainer.Class(classProto, c.nameResolver, c.typeTable, (containingDeclaration as? ClassDescriptor)?.kind)