diff --git a/lc123/cloud/app/plugin/utils/FWRestfulUtils.java b/lc123/cloud/app/plugin/utils/FWRestfulUtils.java
index b94fcf9..72257f1 100644
--- a/lc123/cloud/app/plugin/utils/FWRestfulUtils.java
+++ b/lc123/cloud/app/plugin/utils/FWRestfulUtils.java
@@ -23,7 +23,6 @@ import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.impl.client.HttpClients;
 import org.apache.http.message.BasicNameValuePair;
 import org.apache.http.util.EntityUtils;
-import org.jetbrains.annotations.Nullable;
 
 import java.math.BigInteger;
 import java.security.MessageDigest;