Remove docs changeset release metadata (browserbase#2057)

# why
The docs-only changeset from PR browserbase#2017 created release metadata for a
docs workspace package that should not be published to npm.

# what changed
Reverted the generated docs package changelog and version bump while
keeping the actual MCP documentation updates intact.


<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Removed accidental release metadata for the docs workspace so it isn’t
treated as a publishable package. Keeps the MCP docs from browserbase#2017 intact.
Aligns with Linear STG-1869.

- **Bug Fixes**
  - Deleted `packages/docs/CHANGELOG.md`.
  - Reset `@browserbasehq/stagehand-docs` version to 1.0.0.

<sup>Written for commit ff9c8eb.
Summary will update on new commits. <a
href="https://cubic.dev/pr/browserbase/stagehand/pull/2057?utm_source=github">Review
in cubic</a></sup>

<!-- End of auto-generated description by cubic. -->

Author: monadoid

packages/docs/CHANGELOG.md

@@ -1,6 +1,6 @@
 {
   "name": "@browserbasehq/stagehand-docs",
-  "version": "1.0.1",
+  "version": "1.0.0",
   "description": "",
   "type": "module",
   "main": "index.js",