remove the Useless dependency : spring-cloud-starter-config (#1967)

apm-webapp/pom.xml

@@ -84,10 +84,6 @@
             <artifactId>httpclient</artifactId>
             <version>${apache-httpclient.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.springframework.cloud</groupId>
-            <artifactId>spring-cloud-starter-config</artifactId>
-        </dependency>
         <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-starter-netflix-zuul</artifactId>