Removed unused zipkin property

Author: marcingrzejszczak

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/zipkin/ZipkinProperties.java

@@ -44,11 +44,6 @@ public class ZipkinProperties {
 	 */
 	private Duration readTimeout = Duration.ofSeconds(10);
 
-	/**
-	 * Name of this application registered in Zipkin. Defaults to spring.application.name.
-	 */
-	private String serviceName;
-
 	public String getEndpoint() {
 		return this.endpoint;
 	}
@@ -73,12 +68,4 @@ public void setReadTimeout(Duration readTimeout) {
 		this.readTimeout = readTimeout;
 	}
 
-	public String getServiceName() {
-		return this.serviceName;
-	}
-
-	public void setServiceName(String serviceName) {
-		this.serviceName = serviceName;
-	}
-
 }