Remove outdated file

core/src/main/java/org/teavm/backend/javascript/RuntimeSupport.java

@@ -1,27 +0,0 @@
-/*
- *  Copyright 2016 Alexey Andreev.
- *
- *  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.
- */
-package org.teavm.backend.javascript;
-
-public final class RuntimeSupport {
-    private RuntimeSupport() {
-    }
-
-    public static void requireNonNull(Object obj) {
-        if (obj == null) {
-            throw new NullPointerException();
-        }
-    }
-}