Remove conflicting static method from Metadata.Custom interface (#13869)

Signed-off-by: Shivansh Arora <[email protected]>

Author: shiv0408

server/src/main/java/org/opensearch/cluster/metadata/Metadata.java

@@ -180,11 +180,6 @@ static Custom fromXContent(XContentParser parser, String name) throws IOExceptio
             // handling any Exception is caller's responsibility
             return parser.namedObject(Custom.class, name, null);
         }
-
-        static Custom fromXContent(XContentParser parser) throws IOException {
-            String currentFieldName = parser.currentName();
-            return fromXContent(parser, currentFieldName);
-        }
     }
 
     public static final Setting<Integer> DEFAULT_REPLICA_COUNT_SETTING = Setting.intSetting(

server/src/main/java/org/opensearch/gateway/remote/RemoteClusterStateService.java

@@ -147,7 +147,7 @@ public class RemoteClusterStateService implements Closeable {
     public static final ChecksumBlobStoreFormat<Metadata.Custom> CUSTOM_METADATA_FORMAT = new ChecksumBlobStoreFormat<>(
         "custom",
         METADATA_NAME_FORMAT,
-        Metadata.Custom::fromXContent
+        null // no need of reader here, as this object is only used to write/serialize the object
     );
 
     /**