Simplify logic

Author: chenjian2664

plugin/trino-delta-lake/src/main/java/io/trino/plugin/deltalake/transactionlog/TemporalTimeTravelUtil.java

@@ -139,16 +139,16 @@ private static long searchTowardsHeadLinear(TrinoFileSystem fileSystem, long sta
                     .filter(Objects::nonNull)
                     .findFirst();
 
-            if (commitInfo.isEmpty()) {
-                entryNumber--;
-                if (entryNumber < 0) {
-                    break;
-                }
-                entries = getEntriesFromJson(entryNumber, transactionLogDir, fileSystem, DataSize.ofBytes(0));
-                continue;
-            }
-
-            if (commitInfo.get().timestamp() <= epochMillis) {
+//            if (commitInfo.isEmpty()) {
+//                entryNumber--;
+//                if (entryNumber < 0) {
+//                    break;
+//                }
+//                entries = getEntriesFromJson(entryNumber, transactionLogDir, fileSystem, DataSize.ofBytes(0));
+//                continue;
+//            }
+
+            if (commitInfo.isPresent() && commitInfo.get().timestamp() <= epochMillis) {
                 return commitInfo.get().version();
             }