delete unused ReturnMetadata class

hibernate-core/src/main/java/org/hibernate/engine/query/spi/ReturnMetadata.java

@@ -1,34 +0,0 @@
-/*
- * Hibernate, Relational Persistence for Idiomatic Java
- *
- * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
- * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
- */
-package org.hibernate.engine.query.spi;
-
-import java.io.Serializable;
-
-import org.hibernate.type.Type;
-
-/**
- * Metadata about the query return(s).
- *
- * @author Steve Ebersole
- */
-public class ReturnMetadata implements Serializable {
-	private final String[] returnAliases;
-	private final Type[] returnTypes;
-
-	ReturnMetadata(String[] returnAliases, Type[] returnTypes) {
-		this.returnAliases = returnAliases;
-		this.returnTypes = returnTypes;
-	}
-
-	public String[] getReturnAliases() {
-		return returnAliases;
-	}
-
-	public Type[] getReturnTypes() {
-		return returnTypes;
-	}
-}