Remove unused test file (#2174)

solr/core/src/test-files/solr/collection1/conf/solrconfig-caching.xml

@@ -1,40 +0,0 @@
-<!--
-  Licensed to the Apache Software Foundation (ASF) under one or more
-  contributor license agreements.  See the NOTICE file distributed with
-  this work for additional information regarding copyright ownership.
-  The ASF 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.
-  -->
-<config>
-  <luceneMatchVersion>${tests.luceneMatchVersion:LATEST}</luceneMatchVersion>
-  <xi:include href="solrconfig.snippet.randomindexconfig.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
-  <directoryFactory name="DirectoryFactory" class="${solr.directoryFactory:solr.RAMDirectoryFactory}"/>
-  <schemaFactory class="ClassicIndexSchemaFactory"/>
-  <query>
-    <cache name="lfuCacheDecayFalse"
-           class="solr.CaffeineCache"
-           size="10"
-           initialSize="9"
-           timeDecay="false" />
-
-    <cache name="lfuCacheDecayTrue"
-           class="solr.CaffeineCache"
-           size="10"
-           initialSize="9"
-           timeDecay="true" />
-
-    <cache name="lfuCacheDecayDefault"
-           class="solr.CaffeineCache"
-           size="10"
-           initialSize="9" />
-  </query>
-</config>