Remove Microsoft Corporation copyright from AGENTS.md and CLAUDE.md (#7932)
## Summary
- Remove the `# Copyright (c) Microsoft Corporation.` line from the
license header template in both AGENTS.md and CLAUDE.md
- The project license header should only contain the SPDX identifier and
team attribution
## Test plan
- [x] Verify AGENTS.md and CLAUDE.md no longer reference Microsoft
Corporation copyright
Signed-off-by: Zhipeng Wang <zwanga@wustl.edu>
Co-authored-by: Zhipeng Wang <zwanga@wustl.edu>
Co-authored-by: Olatunji Ruwase <tunji.ruwase@snowflake.com>