[JS FE] remove unused ReleaseCoroutinesDisabledLanguageVersionSettings

js/js.frontend/src/org/jetbrains/kotlin/js/config/ReleaseCoroutinesDisabledLanguageVersionSettings.java

@@ -1,57 +0,0 @@
-/*
- * Copyright 2010-2018 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.js.config;
-
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.kotlin.config.*;
-
-public class ReleaseCoroutinesDisabledLanguageVersionSettings implements LanguageVersionSettings {
-    @NotNull
-    private final LanguageVersionSettings delegate;
-
-    public ReleaseCoroutinesDisabledLanguageVersionSettings(@NotNull LanguageVersionSettings delegate) {
-        this.delegate = delegate;
-    }
-
-    @NotNull
-    @Override
-    public LanguageFeature.State getFeatureSupport(@NotNull LanguageFeature feature) {
-        if (feature.equals(LanguageFeature.ReleaseCoroutines)) {
-            return LanguageFeature.State.DISABLED;
-        }
-        return delegate.getFeatureSupport(feature);
-    }
-
-    @Override
-    public boolean isPreRelease() {
-        return delegate.isPreRelease();
-    }
-
-    @Override
-    public <T> T getFlag(@NotNull AnalysisFlag<? extends T> flag) {
-        return delegate.getFlag(flag);
-    }
-
-    @NotNull
-    @Override
-    public ApiVersion getApiVersion() {
-        return delegate.getApiVersion();
-    }
-
-    @NotNull
-    @Override
-    public LanguageVersion getLanguageVersion() {
-        return delegate.getLanguageVersion();
-    }
-
-    @Override
-    public boolean supportsFeature(@NotNull LanguageFeature feature) {
-        if (feature.equals(LanguageFeature.ReleaseCoroutines)) {
-            return false;
-        }
-        return delegate.supportsFeature(feature);
-    }
-}