removed unused AOP config

src/main/resources/META-INF/aop.xml

-<?xml version="1.0"?>
-
-<!-- Custom aspects for the PetClinic sample application -->
-<aspectj>
-
-	<weaver>
-		<include within="org.springframework.samples.petclinic.model..*"/>
-	</weaver>
-
-	<aspects>
-		<aspect name="org.springframework.samples.petclinic.model.aspects.UsageLogAspect"/>
-		<concrete-aspect name="org.springframework.samples.petclinic.model.aspects.ApplicationTraceAspect"
-				extends="org.springframework.samples.petclinic.model.aspects.AbstractTraceAspect">
-			<pointcut name="traced" expression="execution(* org.springframework.samples..*.*(..))"/>
-		</concrete-aspect>
-	</aspects>
-
-</aspectj>