Rollup merge of #144368 - petrochenkov:rmrootscope, r=b-naber

resolve: Remove `Scope::CrateRoot`

Use `Scope::Module` with the crate root module inside instead, which should be identical.
This is a simplification by itself, but it will be even larger simplification if something like https://github.com/rust-lang/rust/pull/144131 is implemented, because `Scope::CrateRoot` is also a module with two actual scopes in it (for globs and non-globs).

I also did some renamings for consistency:
- `ScopeSet::AbsolutePath` -> `ScopeSet::ModuleAndExternPrelude`
- `ModuleOrUniformRoot::CrateRootAndExternPrelude` -> `ModuleOrUniformRoot::ModuleAndExternPrelude`
- `is_absolute_path` -> `module_and_extern_prelude`

1 files changed, 0 insertions, 5 deletions

diff --git a/compiler/rustc_resolve/src/diagnostics.rs b/compiler/rustc_resolve/src/diagnostics.rs
index d72fbc189e7..75eed1e9ad3 100644
--- a/compiler/rustc_resolve/src/diagnostics.rs
+++ b/compiler/rustc_resolve/src/diagnostics.rs
@@ -1076,11 +1076,6 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
                         }
                     }
                 }
-                Scope::CrateRoot => {
-                    let root_ident = Ident::new(kw::PathRoot, ident.span);
-                    let root_module = this.resolve_crate_root(root_ident);
-                    this.add_module_candidates(root_module, &mut suggestions, filter_fn, None);
-                }
                 Scope::Module(module, _) => {
                     this.add_module_candidates(module, &mut suggestions, filter_fn, None);
                 }