remove unused

Signed-off-by: xil <xil@uber.com>

Author: luckyxilu66

modules/transport-grpc/src/main/java/org/opensearch/transport/grpc/proto/request/search/query/functionscore/FunctionScoreQueryBuilderProtoUtils.java

@@ -29,7 +29,7 @@
  * This class provides methods to transform Protocol Buffer representations of function score queries
  * into their corresponding OpenSearch FunctionScoreQueryBuilder implementations for search operations.
  */
-public class FunctionScoreQueryBuilderProtoUtils {
+class FunctionScoreQueryBuilderProtoUtils {
 
     // Registry for query conversion - injected by the gRPC plugin
     private static QueryBuilderProtoConverterRegistry REGISTRY;
@@ -48,15 +48,6 @@ public static void setRegistry(QueryBuilderProtoConverterRegistry registry) {
         REGISTRY = registry;
     }
 
-    /**
-     * Gets the current registry.
-     *
-     * @return The current registry
-     */
-    static QueryBuilderProtoConverterRegistry getRegistry() {
-        return REGISTRY;
-    }
-
     /**
      * Converts a Protocol Buffer FunctionScoreQuery to an OpenSearch FunctionScoreQueryBuilder.
      * Similar to {@link FunctionScoreQueryBuilder#fromXContent(XContentParser)}, this method