Add an example code for map.removeAll method [API-15] (#1369)

* add an example code for map.removeAll method

* add copyright and fix import problem

code_samples/map_removeAll_sample.js

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2008-2022, Hazelcast, Inc. All Rights Reserved.
+ *
+ * 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.
+ */
+'use strict';
+
+const { Client, Predicates } = require('hazelcast-client');
+
+(async () => {
+    const client = await Client.newHazelcastClient();
+    const map = await client.getMap('my-distributed-map');
+
+    for (let i = 0; i < 10 ; i++) {
+        await map.put('key' + i, i);
+    }
+    console.log('Map size before removing:', await map.size());
+
+    const predicate = Predicates.between('this', 3, 7);
+    await map.removeAll(predicate);
+
+    console.log('Map size after removing:', await map.size());
+
+    await client.shutdown();
+})().catch(err => {
+    console.error('Error occurred:', err);
+    process.exit(1);
+});
+