refactor(db): simplify TronDatabase.close() by dropping redundant try/finally

doClose() swallows all exceptions internally (both writeOptions and dbSource
paths log at WARN and do not rethrow), so the outer try/finally only existed
to print the End log. Matches the same simplification applied to
CheckPointV2Store.close() in the previous commit.

Addresses review feedback on PR #6688.

Author: warku123

chainbase/src/main/java/org/tron/core/db/TronDatabase.java

@@ -76,11 +76,8 @@ public void reset() {
   @Override
   public void close() {
     logger.info("******** Begin to close {}. ********", getName());
-    try {
-      doClose();
-    } finally {
-      logger.info("******** End to close {}. ********", getName());
-    }
+    doClose();
+    logger.info("******** End to close {}. ********", getName());
   }
 
   /**