docs: remove stale header guidance for AppendRows (#1866)

* docs: remove stale header guidance for AppendRows

PiperOrigin-RevId: 485941276

Source-Link: googleapis/googleapis@a5f5928

Source-Link: https://github.com/googleapis/googleapis-gen/commit/61ebfaa325101bc9b29ee34900b45b2f0d23981e
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* 🦉 Updates from OwlBot post-processor

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google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1/BigQueryWriteClient.java

@@ -325,12 +325,6 @@ public final UnaryCallable<CreateWriteStreamRequest, WriteStream> createWriteStr
    *       `BatchCommitWriteStreams` rpc.
    * </ul>
    *
-   * <p>Note: For users coding against the gRPC api directly, it may be necessary to supply the
-   * x-goog-request-params system parameter with `write_stream=&lt;full_write_stream_name&gt;`.
-   *
-   * <p>More information about system parameters:
-   * https://cloud.google.com/apis/docs/system-parameters
-   *
    * <p>Sample code:
    *
    * <pre>{@code

grpc-google-cloud-bigquerystorage-v1/src/main/java/com/google/cloud/bigquery/storage/v1/BigQueryWriteGrpc.java

@@ -424,11 +424,6 @@ public void createWriteStream(
      * * For PENDING streams, data is not made visible until the stream itself is
      * finalized (via the `FinalizeWriteStream` rpc), and the stream is explicitly
      * committed via the `BatchCommitWriteStreams` rpc.
-     * Note: For users coding against the gRPC api directly, it may be
-     * necessary to supply the x-goog-request-params system parameter
-     * with `write_stream=<full_write_stream_name>`.
-     * More information about system parameters:
-     * https://cloud.google.com/apis/docs/system-parameters
      * </pre>
      */
     public io.grpc.stub.StreamObserver<com.google.cloud.bigquery.storage.v1.AppendRowsRequest>
@@ -630,11 +625,6 @@ public void createWriteStream(
      * * For PENDING streams, data is not made visible until the stream itself is
      * finalized (via the `FinalizeWriteStream` rpc), and the stream is explicitly
      * committed via the `BatchCommitWriteStreams` rpc.
-     * Note: For users coding against the gRPC api directly, it may be
-     * necessary to supply the x-goog-request-params system parameter
-     * with `write_stream=&lt;full_write_stream_name&gt;`.
-     * More information about system parameters:
-     * https://cloud.google.com/apis/docs/system-parameters
      * </pre>
      */
     public io.grpc.stub.StreamObserver<com.google.cloud.bigquery.storage.v1.AppendRowsRequest>

proto-google-cloud-bigquerystorage-v1/src/main/proto/google/cloud/bigquery/storage/v1/storage.proto

@@ -167,13 +167,6 @@ service BigQueryWrite {
   // * For PENDING streams, data is not made visible until the stream itself is
   // finalized (via the `FinalizeWriteStream` rpc), and the stream is explicitly
   // committed via the `BatchCommitWriteStreams` rpc.
-  //
-  // Note: For users coding against the gRPC api directly, it may be
-  // necessary to supply the x-goog-request-params system parameter
-  // with `write_stream=<full_write_stream_name>`.
-  //
-  // More information about system parameters:
-  // https://cloud.google.com/apis/docs/system-parameters
   rpc AppendRows(stream AppendRowsRequest) returns (stream AppendRowsResponse) {
     option (google.api.http) = {
       post: "/v1/{write_stream=projects/*/datasets/*/tables/*/streams/*}"