Update RowMapperGen.java (#1332)

Author: kenkania

vertx-sql-client-templates/src/main/java/io/vertx/sqlclient/templates/generator/RowMapperGen.java

@@ -67,7 +67,6 @@ private String genFunctionExtends(DataObjectModel model) {
 
   private void genFromRow(String visibility, DataObjectModel model, PrintWriter writer) {
     writer.print("\n");
-    writer.print("  @io.vertx.codegen.annotations.GenIgnore\n");
     writer.print("  " + genSimpleName(model) + " INSTANCE = new " + genSimpleName(model) + "() { };\n");
     writer.print("\n");
     writer.print("  @io.vertx.codegen.annotations.GenIgnore\n");