SEC-271: removed import of spring-util.xsd as it is not required

sandbox/spring-security-config/src/main/resources/org/acegisecurity/config/spring-security-2.0.xsd

@@ -3,11 +3,8 @@
 <xsd:schema xmlns="http://www.springframework.org/schema/security"
 	xmlns:xsd="http://www.w3.org/2001/XMLSchema"
 	targetNamespace="http://www.springframework.org/schema/security"
-	xmlns:util="http://www.springframework.org/schema/util"
 	elementFormDefault="qualified" attributeFormDefault="unqualified">
 
-	<xsd:import namespace="http://www.springframework.org/schema/util" />
-
 	<xsd:element name="session-context-integration">
 		<xsd:complexType>
 			<xsd:attribute name="id" type="xsd:ID">