all: fix lint error (#5464)

diff --git a/core/src/main/java/io/grpc/NameResolver.java b/core/src/main/java/io/grpc/NameResolver.java
index c38512f..65469e5 100644
--- a/core/src/main/java/io/grpc/NameResolver.java
+++ b/core/src/main/java/io/grpc/NameResolver.java
@@ -274,8 +274,6 @@
 
       /**
        * Returns a {@link ConfigOrError} for the successfully parsed config.
-       *
-       * @since 1.20.0
        */
       public static <T> ConfigOrError<T> fromConfig(T config) {
         return new ConfigOrError<>(config);
@@ -285,8 +283,6 @@
        * Returns a {@link ConfigOrError} for the failure to parse the config.
        *
        * @param status a non-OK status
-       *
-       * @since 1.20.0
        */
       public static <T> ConfigOrError<T> fromError(Status status) {
         return new ConfigOrError<>(status);
@@ -308,8 +304,6 @@
 
       /**
        * Returns config if exists, otherwise null.
-       *
-       * @since 1.20.0
        */
       @Nullable
       public T getConfig() {
@@ -318,8 +312,6 @@
 
       /**
        * Returns error status if exists, otherwise null.
-       *
-       * @since 1.20.0
        */
       @Nullable
       public Status getError() {
diff --git a/core/src/main/java/io/grpc/internal/ManagedChannelServiceConfig.java b/core/src/main/java/io/grpc/internal/ManagedChannelServiceConfig.java
index aac8f74..0f73249 100644
--- a/core/src/main/java/io/grpc/internal/ManagedChannelServiceConfig.java
+++ b/core/src/main/java/io/grpc/internal/ManagedChannelServiceConfig.java
@@ -31,7 +31,6 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
-import java.util.logging.Logger;
 
 /**
  * {@link ManagedChannelServiceConfig} is a fully parsed and validated representation of service
@@ -39,9 +38,6 @@
  */
 final class ManagedChannelServiceConfig {
 
-  private static final Logger logger =
-      Logger.getLogger(ManagedChannelServiceConfig.class.getName());
-
   private final Map<String, MethodInfo> serviceMethodMap;
   private final Map<String, MethodInfo> serviceMap;