Updated test_supported_models_aliases.py to reflect the removal of self-referencing aliases:
- Removed assertion for "o4-mini" in its own aliases (no longer self-referencing)
- Updated "o3-pro" alias test to use "o3pro" (normalized alias format)
- Fixed alias resolution test for o3pro -> o3-pro
These changes align with the fix for duplicate model listings in listmodels output.
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Co-Authored-By: Claude <noreply@anthropic.com>