remove redundant code

spring-cloud-starter-tencent-polaris-config/src/main/java/com/tencent/cloud/polaris/config/adapter/PolarisPropertySourceAutoRefresher.java

@@ -151,7 +151,7 @@ public class PolarisPropertySourceAutoRefresher
 	 * java.lang.String, java.util.Set, org.springframework.beans.TypeConverter)
 	 */
 	private Object resolvePropertyValue(SpringValue springValue) {
-		// value will never be null, as @Value and @ApolloJsonValue will not allow that
+		// value will never be null
 		Object value = placeholderHelper
 				.resolvePropertyValue(beanFactory, springValue.getBeanName(), springValue.getPlaceholder());
 

spring-cloud-starter-tencent-polaris-config/src/main/java/com/tencent/cloud/polaris/config/spring/property/SpringValue.java

@@ -35,13 +35,13 @@ public class SpringValue {
 
 	private MethodParameter methodParameter;
 	private Field field;
-	private WeakReference<Object> beanRef;
+	private final WeakReference<Object> beanRef;
-	private String beanName;
+	private final String beanName;
-	private String key;
+	private final String key;
-	private String placeholder;
+	private final String placeholder;
-	private Class<?> targetType;
+	private final Class<?> targetType;
 	private Type genericType;
-	private boolean isJson;
+	private final boolean isJson;
 
 	public SpringValue(String key, String placeholder, Object bean, String beanName, Field field, boolean isJson) {
 		this.beanRef = new WeakReference<>(bean);