Remove Windows from CI test matrix

Remove windows-latest from the CI test matrix to focus on
macOS and Linux testing only.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: orionarcher

.github/workflows/CI.yaml

@@ -44,7 +44,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macOS-latest, ubuntu-latest, windows-latest]
+        os: [macOS-latest, ubuntu-latest]
         python-version: [3.11, 3.12, 3.13]
 
     steps: