diff --git a/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/JSLanguageVersionSettings.kt b/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/JSLanguageVersionSettings.kt
deleted file mode 100644
index 9086976b04b..00000000000
--- a/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/JSLanguageVersionSettings.kt
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package org.jetbrains.kotlin.cli.js
-
-import org.jetbrains.kotlin.config.*
-
-class JSLanguageVersionSettings(private val delegate: LanguageVersionSettings) : LanguageVersionSettings {
-    companion object {
-        private val disabledFeatures = setOf(
-            LanguageFeature.NewInference,
-            LanguageFeature.FunctionalInterfaceConversion,
-            LanguageFeature.SamConversionForKotlinFunctions,
-            LanguageFeature.SamConversionPerArgument,
-            LanguageFeature.FunctionReferenceWithDefaultValueAsOtherType,
-            LanguageFeature.NonStrictOnlyInputTypesChecks
-        )
-    }
-
-    override fun getFeatureSupport(feature: LanguageFeature): LanguageFeature.State {
-        return if (feature in disabledFeatures)
-            LanguageFeature.State.DISABLED
-        else
-            delegate.getFeatureSupport(feature)
-    }
-
-    override fun isPreRelease(): Boolean = delegate.isPreRelease()
-
-    override fun <T> getFlag(flag: AnalysisFlag<T>): T = delegate.getFlag(flag)
-
-    override val apiVersion: ApiVersion
-        get() = delegate.apiVersion
-
-    override val languageVersion: LanguageVersion
-        get() = delegate.languageVersion
-}
\ No newline at end of file
diff --git a/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/K2JSCompiler.java b/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/K2JSCompiler.java
index 15f1d7e0264..8db9bb7764b 100644
--- a/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/K2JSCompiler.java
+++ b/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/K2JSCompiler.java
@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2017 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
 package org.jetbrains.kotlin.cli.js;
@@ -246,13 +235,6 @@ public class K2JSCompiler extends CLICompiler<K2JSCompilerArguments> {
 
         configuration.put(CommonConfigurationKeys.MODULE_NAME, FileUtil.getNameWithoutExtension(outputFile));
 
-        if (!arguments.getNewInference()) {
-            CommonConfigurationKeysKt.setLanguageVersionSettings(
-                    configuration,
-                    new JSLanguageVersionSettings(CommonConfigurationKeysKt.getLanguageVersionSettings(configuration))
-            );
-        }
-
         JsConfig config = new JsConfig(project, configuration);
         JsConfig.Reporter reporter = new JsConfig.Reporter() {
             @Override