[VS Code] Remove unused codes associated with gca cmds

[fredzqm]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @fredzqm, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on a significant cleanup and refactoring effort within the VS Code extension by removing all code paths and dependencies related to the Gemini Code Assist (GCA) and Cloud AI Companion API integrations. The primary goal is to streamline the codebase, remove deprecated features, and reduce the overall project footprint.

Highlights

• Gemini Code Assist (GCA) Integration Removal: The entire integration with Gemini Code Assist (GCA) and its associated AI-powered code generation features have been removed from the VS Code extension. This includes disabling the GCA tool client and controller.
• Cloud AI Companion API Client Deprecation: The dedicated client for the Cloud AI Companion API, along with its unit tests, has been completely removed, signifying the deprecation of these AI-driven functionalities.
• Dependency Cleanup: Unused development dependencies, specifically those related to @puppeteer/browsers, chromium-bidi, devtools-protocol, puppeteer-core, and zod, have been removed from package-lock.json, streamlining the project's dependencies.

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[gemini-code-assist]

Code Review

This pull request effectively removes unused code associated with Gemini Code Assist commands. The changes include deleting dependencies, client files, and cleaning up related imports and service methods. My main feedback is on two files that have been entirely commented out. For better code maintainability, it's preferable to delete unused files rather than commenting them out to avoid clutter and potential confusion for future developers.

[fredzqm]

@hlshen Here is a clean up PR to remove dead code.

Please take a look~