feat: fix compile error

spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-gateway/src/main/java/com/tencent/cloud/polaris/router/grayrelease/gateway/GatewayController.java

@@ -23,7 +23,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.core.env.Environment;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.client.RestTemplate;
 
@@ -34,9 +33,6 @@ public class GatewayController {
 	@Autowired
 	private RestTemplate restTemplate;
 
-	@Autowired
-	private MetadataLocalProperties localProperties;
-
 	@Autowired
 	private Environment environment;