* Remove the deprecated rustpython-compiler-source crate
Nothing in the workspace depends on it, and its version was pinned to
0.4.1+deprecated, which is already on crates.io. Drop the crate, its
Cargo.lock entry, and the mentions in host_env_proposal.md.
Assisted-by: Claude Code:claude-fable-5-1
* ci: drop the rustpython-compiler-source exclusions
The crate no longer exists in the workspace.
Assisted-by: Claude Code:claude-fable-5-1
* venvlauncher: mark the crate as not publishable
It is a Windows-only binary that venv copies out of the installation,
not a crates.io dependency.
Assisted-by: Claude Code:claude-fable-5-1
Jeong, YunWon