clean up

Author: ChrisHegarty

server/src/test/java/org/elasticsearch/index/mapper/CompletionFieldMapperTests.java

@@ -17,7 +17,6 @@
 import org.apache.lucene.index.IndexableField;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.search.suggest.document.Completion101PostingsFormat;
-import org.apache.lucene.search.suggest.document.Completion912PostingsFormat;
 import org.apache.lucene.search.suggest.document.CompletionAnalyzer;
 import org.apache.lucene.search.suggest.document.ContextSuggestField;
 import org.apache.lucene.search.suggest.document.FuzzyCompletionQuery;
@@ -149,21 +148,19 @@ protected IndexAnalyzers createIndexAnalyzers(IndexSettings indexSettings) {
     }
 
     public void testPostingsFormat() throws IOException {
+        final Class<?> latestLuceneCPClass = Completion101PostingsFormat.class;
         MapperService mapperService = createMapperService(fieldMapping(this::minimalMapping));
         CodecService codecService = new CodecService(mapperService, BigArrays.NON_RECYCLING_INSTANCE);
         Codec codec = codecService.codec("default");
         if (CodecService.ZSTD_STORED_FIELDS_FEATURE_FLAG.isEnabled()) {
             assertThat(codec, instanceOf(PerFieldMapperCodec.class));
-            assertThat(((PerFieldMapperCodec) codec).getPostingsFormatForField("field"), instanceOf(Completion101PostingsFormat.class));
+            assertThat(((PerFieldMapperCodec) codec).getPostingsFormatForField("field"), instanceOf(latestLuceneCPClass));
         } else {
             if (codec instanceof CodecService.DeduplicateFieldInfosCodec deduplicateFieldInfosCodec) {
                 codec = deduplicateFieldInfosCodec.delegate();
             }
             assertThat(codec, instanceOf(LegacyPerFieldMapperCodec.class));
-            assertThat(
-                ((LegacyPerFieldMapperCodec) codec).getPostingsFormatForField("field"),
-                instanceOf(Completion101PostingsFormat.class)
-            );
+            assertThat(((LegacyPerFieldMapperCodec) codec).getPostingsFormatForField("field"), instanceOf(latestLuceneCPClass));
         }
     }