feat: Add llama-stack-client datasets unregister command (#222)

# What does this PR do?
[Provide a short summary of what this PR does and why. Link to relevant
issues if applicable.]

[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])

## Test Plan
[Describe the tests you ran to verify your changes with result
summaries. *Provide clear instructions so the plan can be easily
re-executed.*]

[//]: # (## Documentation)
[//]: # (- [ ] Added a Changelog entry if the change is significant)

Signed-off-by: Josh Salomon <jsalomon@redhat.com>

Author: JoshSalomon

src/llama_stack_client/lib/cli/datasets/datasets.py

@@ -7,6 +7,7 @@
 
 from .list import list_datasets
 from .register import register
+from .unregister import unregister
 
 
 @click.group()
@@ -18,3 +19,4 @@ def datasets():
 # Register subcommands
 datasets.add_command(list_datasets)
 datasets.add_command(register)
+datasets.add_command(unregister)

src/llama_stack_client/lib/cli/datasets/unregister.py

@@ -0,0 +1,20 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+import click
+
+from ..common.utils import handle_client_errors
+
+
+@click.command("unregister")
+@click.help_option("-h", "--help")
+@click.argument("dataset-id", required=True)
+@click.pass_context
+@handle_client_errors("unregister dataset")
+def unregister(ctx, dataset_id: str):
+    """Remove a dataset"""
+    client = ctx.obj["client"]
+    client.datasets.unregister(dataset_id=dataset_id)
+    click.echo(f"Dataset '{dataset_id}' unregistered successfully")