[test] Unmute FsDirectoryFactoryTests#testPreload (#115438)

Resolve #110211

Author: arteam

muted-tests.yml

@@ -17,9 +17,6 @@ tests:
 - class: "org.elasticsearch.xpack.deprecation.DeprecationHttpIT"
   issue: "https://github.com/elastic/elasticsearch/issues/108628"
   method: "testDeprecatedSettingsReturnWarnings"
-- class: org.elasticsearch.index.store.FsDirectoryFactoryTests
-  method: testPreload
-  issue: https://github.com/elastic/elasticsearch/issues/110211
 - class: "org.elasticsearch.xpack.searchablesnapshots.FrozenSearchableSnapshotsIntegTests"
   issue: "https://github.com/elastic/elasticsearch/issues/110408"
   method: "testCreateAndRestorePartialSearchableSnapshot"

server/src/test/java/org/elasticsearch/index/store/FsDirectoryFactoryTests.java

@@ -115,8 +115,6 @@ private void doTestPreload(String... preload) throws IOException {
                 var func = fsDirectoryFactory.preLoadFuncMap.get(mmapDirectory);
                 assertNotEquals(fsDirectoryFactory.preLoadFuncMap.get(mmapDirectory), MMapDirectory.ALL_FILES);
                 assertNotEquals(fsDirectoryFactory.preLoadFuncMap.get(mmapDirectory), MMapDirectory.NO_FILES);
-                assertTrue(func.test("foo.dvd", newIOContext(random())));
-                assertTrue(func.test("foo.tmp", newIOContext(random())));
                 for (String ext : preload) {
                     assertTrue("ext: " + ext, func.test("foo." + ext, newIOContext(random())));
                 }