Remove deprecated query name in short version of regexp query

Author: cbuescher

core/src/main/java/org/elasticsearch/index/query/RegexpQueryBuilder.java

@@ -47,8 +47,6 @@ public class RegexpQueryBuilder extends AbstractQueryBuilder<RegexpQueryBuilder>
     public static final int DEFAULT_FLAGS_VALUE = RegexpFlag.ALL.value();
     public static final int DEFAULT_MAX_DETERMINIZED_STATES = Operations.DEFAULT_MAX_DETERMINIZED_STATES;
 
-    private static final ParseField NAME_FIELD = new ParseField("_name")
-            .withAllDeprecated("query name is not supported in short version of regexp query");
     private static final ParseField FLAGS_VALUE_FIELD = new ParseField("flags_value");
     private static final ParseField MAX_DETERMINIZED_STATES_FIELD = new ParseField("max_determinized_states");
     private static final ParseField FLAGS_FIELD = new ParseField("flags");
@@ -219,13 +217,9 @@ public static RegexpQueryBuilder fromXContent(XContentParser parser) throws IOEx
                     }
                 }
             } else {
-                if (NAME_FIELD.match(currentFieldName)) {
-                    queryName = parser.text();
-                } else {
-                    throwParsingExceptionOnMultipleFields(NAME, parser.getTokenLocation(), fieldName, parser.currentName());
-                    fieldName = currentFieldName;
-                    value = parser.textOrNull();
-                }
+                throwParsingExceptionOnMultipleFields(NAME, parser.getTokenLocation(), fieldName, parser.currentName());
+                fieldName = currentFieldName;
+                value = parser.textOrNull();
             }
         }