KAFKA-19314 Remove unnecessary code of closing snapshotWriter (#19763)

- Remove redundant close of `snapshotWriter`.
- `snapshotWriter` is already closed by `RaftSnapshotWriter#writer`.

Reviewers: Jhen-Yung Hsu <jhenyunghsu@gmail.com>, Ken Huang
 <s7133700@gmail.com>, Chia-Ping Tsai <chia7712@gmail.com>

metadata/src/main/java/org/apache/kafka/image/publisher/SnapshotEmitter.java

@@ -158,7 +158,6 @@ public class SnapshotEmitter implements SnapshotGenerator.Emitter {
             throw e;
         } finally {
             Utils.closeQuietly(writer, "RaftSnapshotWriter");
-            Utils.closeQuietly(snapshotWriter.get(), "SnapshotWriter");
         }
     }
 }