fix(ci): remove build_command from semantic-release config

The python-semantic-release action runs in a Docker container where uv
is not available. Let the workflow handle building instead.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: abrichr

pyproject.toml

@@ -89,7 +89,6 @@ packages = ["openadapt_ml"]
 version_toml = ["pyproject.toml:project.version"]
 branch = "main"
 commit_message = "chore: release {version}"
-build_command = "uv build"
 
 [tool.semantic_release.commit_parser_options]
 allowed_tags = ["build", "chore", "ci", "docs", "feat", "fix", "perf", "refactor", "style", "test"]