fix: remove metadata failover config

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/config/properties/PolarisMetadataRouterProperties.java

@@ -30,16 +30,6 @@ public class PolarisMetadataRouterProperties {
 
 	private boolean enabled = true;
 
-	private MetadataFailoverType failOver = MetadataFailoverType.METADATAFAILOVERALL;
-
-	public MetadataFailoverType getFailOver() {
-		return failOver;
-	}
-
-	public void setFailOver(MetadataFailoverType failOver) {
-		this.failOver = failOver;
-	}
-
 	public boolean isEnabled() {
 		return enabled;
 	}

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/interceptor/MetadataRouterRequestInterceptor.java

@@ -50,6 +50,5 @@ public class MetadataRouterRequestInterceptor implements RouterRequestIntercepto
 				.getMetadataContainer(MetadataType.CUSTOM, false);
 		String metadataRouteKeys = metadataContainer.getRawMetadataStringValue(LABEL_KEY_METADATA_ROUTER_KEYS);
 		metadataContainer.putMetadataMapValue(MetadataRouter.ROUTER_TYPE_METADATA, MetadataRouter.KEY_METADATA_KEYS, metadataRouteKeys, TransitiveType.NONE);
-		request.setMetadataFailoverType(polarisMetadataRouterProperties.getFailOver());
 	}
 }