HDFS-17637. Fix spotbugs in HttpFSFileSystem#getXAttr (#7099) Contributed by Hualong Zhang.

Reviewed-by: Shilun Fan <slfan1989@apache.org>
Signed-off-by: Shilun Fan <slfan1989@apache.org>

hadoop-hdfs-project/hadoop-hdfs-httpfs/src/main/java/org/apache/hadoop/fs/http/client/HttpFSFileSystem.java

@@ -1370,7 +1370,7 @@ public class HttpFSFileSystem extends FileSystem
     JSONObject json = (JSONObject) HttpFSUtils.jsonParse(conn);
     Map<String, byte[]> xAttrs = createXAttrMap(
         (JSONArray) json.get(XATTRS_JSON));
-    return xAttrs != null ? xAttrs.get(name) : null;
+    return xAttrs.get(name);
   }
 
   /** Convert xAttrs json to xAttrs map */