fix: format

Author: blakeli0

sdk-platform-java/gax-java/gax/src/main/java/com/google/api/gax/tracing/ObservabilityAttributes.java

@@ -50,12 +50,6 @@ public class ObservabilityAttributes {
   /** The repository of the client library (e.g., "googleapis/google-cloud-java"). */
   public static final String REPO_ATTRIBUTE = "gcp.client.repo";
 
-  /** The artifact name of the client library (e.g., "google-cloud-vision"). */
-  public static final String ARTIFACT_ATTRIBUTE = "gcp.client.artifact";
-
-  /** The version of the client library (e.g., "1.2.3"). */
-  public static final String VERSION_ATTRIBUTE = "gcp.client.version";
-
   /** The full RPC method name, including package, service, and method. */
   public static final String GRPC_RPC_METHOD_ATTRIBUTE = "rpc.method";
 

sdk-platform-java/java-showcase/gapic-showcase/src/test/java/com/google/showcase/v1beta1/it/ITOtelTracing.java

@@ -103,8 +103,6 @@ class ITOtelTracing {
       AttributeKey.longKey(ObservabilityAttributes.HTTP_RESPONSE_STATUS_ATTRIBUTE);
   private static final AttributeKey<String> REPO_KEY =
       AttributeKey.stringKey(ObservabilityAttributes.REPO_ATTRIBUTE);
-  private static final AttributeKey<String> ARTIFACT_KEY =
-      AttributeKey.stringKey(ObservabilityAttributes.ARTIFACT_ATTRIBUTE);
   private static final AttributeKey<String> ERROR_TYPE_KEY =
       AttributeKey.stringKey(ObservabilityAttributes.ERROR_TYPE_ATTRIBUTE);
   private static final AttributeKey<String> EXCEPTION_TYPE_KEY =