diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index 41b29f9279d..370482da157 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -73,6 +73,9 @@ Upgrade Notes
   4lw.commands.whitelist=* to enable all ZooKeeper "4 letter commands".
   (Erick Erickson)
 
+* SOLR-13515: org.apache.solr.util.SolrPluginUtils.IdentityRegenerator has been removed, please use
+  the identical org.apache.solr.search.NoOpRegenerator instead. (David Smiley, Christine Poerschke)
+
 New Features
 ----------------------
 
diff --git a/solr/core/src/java/org/apache/solr/util/SolrPluginUtils.java b/solr/core/src/java/org/apache/solr/util/SolrPluginUtils.java
index 02b253e1b14..2807ad652e2 100644
--- a/solr/core/src/java/org/apache/solr/util/SolrPluginUtils.java
+++ b/solr/core/src/java/org/apache/solr/util/SolrPluginUtils.java
@@ -63,7 +63,6 @@ import org.apache.solr.request.json.RequestUtil;
 import org.apache.solr.response.SolrQueryResponse;
 import org.apache.solr.schema.IndexSchema;
 import org.apache.solr.schema.SchemaField;
-import org.apache.solr.search.CacheRegenerator;
 import org.apache.solr.search.DocIterator;
 import org.apache.solr.search.DocList;
 import org.apache.solr.search.DocSet;
@@ -71,7 +70,6 @@ import org.apache.solr.search.FieldParams;
 import org.apache.solr.search.QParser;
 import org.apache.solr.search.QueryParsing;
 import org.apache.solr.search.ReturnFields;
-import org.apache.solr.search.SolrCache;
 import org.apache.solr.search.SolrIndexSearcher;
 import org.apache.solr.search.SolrQueryParser;
 import org.apache.solr.search.SortSpecParsing;
@@ -974,28 +972,6 @@ public class SolrPluginUtils {
     return out;
   }
 
-  /**
-   * A CacheRegenerator that can be used whenever the items in the cache
-   * are not dependant on the current searcher.
-   *
-   * <p>
-   * Flat out copies the oldKey=&gt;oldVal pair into the newCache
-   * </p>
-   */
-  public static class IdentityRegenerator implements CacheRegenerator {
-    @Override
-    public boolean regenerateItem(SolrIndexSearcher newSearcher,
-                                  SolrCache newCache,
-                                  SolrCache oldCache,
-                                  Object oldKey,
-                                  Object oldVal)
-      throws IOException {
-
-      newCache.put(oldKey,oldVal);
-      return true;
-    }
-  }
-
   public static void invokeSetters(Object bean, Iterable<Map.Entry<String,Object>> initArgs) {
     invokeSetters(bean, initArgs, false);
   }