remove thread leak filter, should have been removed in #9843

src/test/java/org/elasticsearch/test/ElasticsearchThreadFilter.java

@@ -1,55 +0,0 @@
-/*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you 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.elasticsearch.test;
-
-import com.carrotsearch.randomizedtesting.ThreadFilter;
-import org.elasticsearch.common.network.MulticastChannel;
-import org.elasticsearch.tribe.TribeTests;
-
-import java.util.regex.Pattern;
-
-/**
- * Simple thread filter for randomized runner
- * This filter rejectes all threads that are known to leak across tests / suites
- * It will cause threads leaking from threadpools / executors in unittests
- * to fail the test.
- */
-public final class ElasticsearchThreadFilter implements ThreadFilter {
-
-    private final Pattern nodePrefix = Pattern.compile("\\[(" +
-            "(" + Pattern.quote(InternalTestCluster.TRANSPORT_CLIENT_PREFIX) + ")?(" +
-            Pattern.quote(ElasticsearchIntegrationTest.SUITE_CLUSTER_NODE_PREFIX) + "|" +
-            Pattern.quote(ElasticsearchIntegrationTest.TEST_CLUSTER_NODE_PREFIX) + "|" +
-            Pattern.quote(ExternalTestCluster.EXTERNAL_CLUSTER_PREFIX) + "|" +
-            Pattern.quote(TribeTests.SECOND_CLUSTER_NODE_PREFIX) + ")"
-            + ")\\d+\\]");
-
-    @Override
-    public boolean reject(Thread t) {
-        String threadName = t.getName();
-
-        if (threadName.contains("[" + MulticastChannel.SHARED_CHANNEL_NAME + "]")
-                || threadName.contains("[" + ElasticsearchSingleNodeTest.nodeName() + "]")
-                || threadName.contains("Keep-Alive-Timer")) {
-            return true;
-        }
-        return nodePrefix.matcher(t.getName()).find();
-    }
-}