Function builtin_remove_source 

fn builtin_remove_source(
    args: &[RValue],
    _: &[(String, RValue)],
) -> Result<RValue, RError>

tools::vignetteEngine — register/query vignette engines. removeSource(fn) — strip source references from a function.

No-op in miniR — we don’t store source references.

@param fn a function @return the function unchanged @namespace utils