Drop support for DebuggerTools being invoked from the top-level bootstrap CLI

[jyn514]

@Mark-Simulacrum mentioned we'd also need some work to ensure they're in dist tarballs, but it looks like they're already present:

rust/src/bootstrap/dist.rs

Lines 433 to 435 in 52ca603

	// Debugger scripts
	builder
	.ensure(DebuggerScripts { sysroot: INTERNER.intern_path(image.to_owned()), host });

So I think this is as simple as changing

rust/src/bootstrap/dist.rs

Lines 455 to 459 in 52ca603

	impl Step for DebuggerScripts {
	type Output = ();
	fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
	run.path("src/lldb_batchmode.py")

to run.never() and deleting

rust/src/bootstrap/builder.rs

Line 581 in 52ca603

dist::DebuggerScripts,

Originally posted by @Mark-Simulacrum in #95906 (comment)

[jyn514]

I double checked and this is never invoked by any scripts in-tree, not even in CI.

[Mark-Simulacrum]

That sounds right to me -- I think what I meant is that it's possible we should make sure they're present in regular sysroots (i.e., those produced by compile::Assemble like stage1/...), so that tests can pick them up as needed. That's a separate action item here but might be easy enough to bundle in.

[bertptrs]

I would like to tackle this as my first issue. @rustbot claim

[bertptrs]

The PR has been merged and I don't think there is anything left to do. Can we close this issue?

[jyn514]

Ah yes :) in the future you can add "Fixes #959922" to your PR description to have it closed automatically.