diff --git a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Context.kt b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Context.kt
index 85415f942cb..7c32df1e0f3 100644
--- a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Context.kt
+++ b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Context.kt
@@ -187,7 +187,6 @@ internal class SpecialDeclarationsFactory(val context: Context) {
 }
 
 internal class Context(config: KonanConfig) : KonanBackendContext(config) {
-    override val lateinitNullableFields = mutableMapOf<IrField, IrField>()
     lateinit var frontendServices: FrontendServices
     lateinit var environment: KotlinCoreEnvironment
     lateinit var bindingContext: BindingContext
diff --git a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanBackendContext.kt b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanBackendContext.kt
index 56c000f2e2f..d0fcbde4df6 100644
--- a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanBackendContext.kt
+++ b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanBackendContext.kt
@@ -36,8 +36,6 @@ internal abstract class KonanBackendContext(val config: KonanConfig) : CommonBac
 
     abstract override val ir: KonanIr
 
-    override val transformedFunction: MutableMap<IrFunctionSymbol, IrSimpleFunctionSymbol>
-        get() = TODO("not implemented")
     override val scriptMode: Boolean = false
 
     override val sharedVariablesManager by lazy {