Remove unused constant in CustomerCreditUpdatePreparedStatementSetter

Author: fmbenhassine

spring-batch-samples/src/main/java/org/springframework/batch/sample/domain/trade/internal/CustomerCreditUpdatePreparedStatementSetter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2014 the original author or authors.
+ * Copyright 2006-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,11 +24,11 @@
 
 /**
  * @author Dave Syer
+ * @author Mahmoud Ben Hassine
  *
  */
 public class CustomerCreditUpdatePreparedStatementSetter implements ItemPreparedStatementSetter<CustomerCredit> {
 	public static final BigDecimal FIXED_AMOUNT = new BigDecimal(1000);
-	public static final String QUERY = "UPDATE CUSTOMER SET CREDIT=? WHERE ID=?";
 
 	/* (non-Javadoc)
 	 * @see org.springframework.batch.io.support.ItemPreparedStatementSetter#setValues(java.lang.Object, java.sql.PreparedStatement)