remove extra assert

Author: vladak

opengrok-indexer/src/test/java/org/opengrok/indexer/history/HistoryGuruTest.java

@@ -497,7 +497,6 @@ void testGetLastHistoryEntryRepoHistoryDisabled() throws Exception {
         Files.move(histPath, tmpHistPath);
         assertFalse(histPath.toFile().exists());
 
-        assertNotNull(repository);
         repository.setHistoryEnabled(false);
         assertNull(instance.getLastHistoryEntry(file, false, true));