Revert "[Bug #1273] Reimplement coerceToString as a workaround for the bug in Decimalbox."

This reverts commit c27253af63.
The bug is fixed in ZK 5.0.10, so there's no need for this workaround.

libreplan-webapp/src/main/java/org/libreplan/web/common/LenientDecimalBox.java

@@ -19,14 +19,15 @@
 package org.libreplan.web.common;
 
 import java.math.BigDecimal;
+import java.text.DecimalFormatSymbols;
+
+import org.zkoss.util.Locales;
 import org.zkoss.zk.ui.WrongValueException;
 import org.zkoss.zul.Decimalbox;
 
 /**
  * Same behavior as a {@link Decimalbox}, but it always interprets <b>.</b> as
  * decimal separator, even when the locale uses a different separator.
- * We also reimplement coerceToString to workaround the bug
- * http://tracker.zkoss.org/browse/ZK-629.
  *
  * @author Óscar González Fernández <ogonzalez@igalia.com>
  * @author Jacobo Aragunde Pérez <jaragunde@igalia.com>
@@ -42,8 +43,4 @@ public class LenientDecimalBox extends Decimalbox {
         super(value);
     }
 
-    protected String coerceToString(Object value) {
-        return formatNumber(value, null);
-    }
-
 }