Update PR comments

Author: shinfan

google-cloud-datastore/src/main/java/com/google/cloud/datastore/RawValue.java

@@ -84,4 +84,4 @@ static Builder newBuilder(com.google.datastore.v1.Value valuePb) {
     builder.set(valuePb);
     return builder;
   }
-}
+}

google-cloud-datastore/src/main/java/com/google/cloud/datastore/Value.java

@@ -238,4 +238,4 @@ static Value<?> fromPb(com.google.datastore.v1.Value proto) {
     return valueType == null ? RawValue.MARSHALLER.fromProto(proto).build()
         : valueType.getMarshaller().fromProto(proto).build();
   }
-}
+}

google-cloud-datastore/src/main/java/com/google/cloud/datastore/ValueBuilder.java

@@ -56,4 +56,4 @@ public interface ValueBuilder<V, P extends Value<V>, B extends ValueBuilder<V, P
   B set(V value);
 
   P build();
-}
+}

google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/spi/v1/MessageReceiver.java

@@ -17,7 +17,6 @@
 package com.google.cloud.pubsub.spi.v1;
 
 import com.google.pubsub.v1.PubsubMessage;
-import java.util.concurrent.BlockingQueue;
 
 /** This interface can be implemented by users of {@link Subscriber} to receive messages. */
 public interface MessageReceiver {