Removed property setting of proxy targetClass

spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/autoconfig/TraceEnvironmentPostProcessor.java

@@ -53,10 +53,6 @@ public class TraceEnvironmentPostProcessor implements EnvironmentPostProcessor {
 		// traces in logs without having to configure it.
 		map.put("logging.pattern.level",
 				"%5p [${spring.zipkin.service.name:${spring.application.name:-}},%X{X-B3-TraceId:-},%X{X-B3-SpanId:-},%X{X-Span-Export:-}]");
-		// TODO: Remove this in 2.0.x. For compatibility we always set to true
-		if (!environment.containsProperty(SPRING_AOP_PROXY_TARGET_CLASS)) {
-			map.put(SPRING_AOP_PROXY_TARGET_CLASS, "true");
-		}
 		addOrReplace(environment.getPropertySources(), map);
 	}