chore: remove stale internal references from samples and docs

Co-authored-by: George Weale <gweale@google.com>
PiperOrigin-RevId: 960573273

Author: GWeale

contributing/samples/integrations/bigtable/agent.py

@@ -116,7 +116,7 @@ def search_hotels_by_location(
     description=(
         "Agent to answer questions about Bigtable database tables and"
         " execute SQL queries."
-    ),  # TODO(b/360128447): Update description
+    ),
     instruction="""\
         You are a data agent with access to several Bigtable tools.
         Make use of those tools to answer the user's questions.

contributing/samples/integrations/eventarc/domain_specific_agent/README.md

@@ -148,4 +148,4 @@ ping_system_tool = toolset.create_publish_tool(
 
 Publishing an event to a Message Bus is only the first half of the journey. To route these events to other agents or microservices, you will need to set up Eventarc Pipelines and Enrollments.
 
-To learn how to connect multiple AI agents together using Eventarc, check out the official codelab: **[Build Event-Driven AI Agents with Eventarc, Cloud Run and ADK](https://codelabs.devsite.corp.google.com/eventarc-ai-agents#0)**.
+To learn how to connect multiple AI agents together using Eventarc, check out the official codelab: **[Build Event-Driven AI Agents with Eventarc, Cloud Run and ADK](https://codelabs.developers.google.com/next26/eventarc-ai-agents)**.

contributing/samples/integrations/eventarc/generic_agent/README.md

@@ -89,4 +89,4 @@ When deploying this agent to Agent Runtime, it can use its unique SPIFFE-based A
 
 Publishing an event to a Message Bus is only the first half of the journey. To route these events to other agents or microservices, you will need to set up Eventarc Pipelines and Enrollments.
 
-To learn how to connect multiple AI agents together using Eventarc, check out the official codelab: **[Build Event-Driven AI Agents with Eventarc, Cloud Run and ADK](https://codelabs.devsite.corp.google.com/eventarc-ai-agents#0)**.
+To learn how to connect multiple AI agents together using Eventarc, check out the official codelab: **[Build Event-Driven AI Agents with Eventarc, Cloud Run and ADK](https://codelabs.developers.google.com/next26/eventarc-ai-agents)**.

contributing/samples/mcp/mcp_sse_mtls_agent/README.md

@@ -44,10 +44,10 @@ python filesystem_server.py
 
 ### Step 2: Run the ADK Agent (Client)
 
-In a second terminal, navigate to the open-source workspace root and run the client.
+In a second terminal, navigate to the repository root and run the client.
 
 ```bash
-cd third_party/py/google/adk/open_source_workspace
+cd adk-python
 source .venv/bin/activate
 
 # 1. Combine system CAs with our test CA so the client trusts the server cert