feat:Remove error log from `DecodeTransferMetadataReactiveFilter`.

spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/registry/PolarisRegistration.java

@@ -69,7 +69,7 @@ public class PolarisRegistration implements Registration {
 
 	private Map<String, String> metadata;
 
-	private String host;
+	private final String host;
 
 	private int port;
 
@@ -133,10 +133,6 @@ public class PolarisRegistration implements Registration {
 		return port;
 	}
 
-	protected void setPort(int port) {
-		this.port = port;
-	}
-
 	@Override
 	public boolean isSecure() {
 		return StringUtils.equalsIgnoreCase(polarisDiscoveryProperties.getProtocol(), "https");