Auto merge of #9927 - xFrednet:0000-rustc-tool-macro-update, r=matthiaskrgr

Cleanup `rustc_tool_util` and add a convenient macro for `build.rs`

changelog: none
<!-- changelog_checked -->

If possible, I'd like to have a new release for this, maybe `v0.3.0` to use the changes in another project. Then we can also remove the `path = "./rustc_tools_util"` from `Cargo.toml`. I'd be happy to help with the release on crates.io if you'd like the help :)

r? `@matthiaskrgr`

2 files changed, 0 insertions, 2 deletions

diff --git a/src/driver.rs b/src/driver.rs
index 9ec4df8e651..bcc096c570e 100644
--- a/src/driver.rs
+++ b/src/driver.rs
@@ -19,7 +19,6 @@ extern crate rustc_span;
 use rustc_interface::interface;
 use rustc_session::parse::ParseSess;
 use rustc_span::symbol::Symbol;
-use rustc_tools_util::VersionInfo;
 
 use std::borrow::Cow;
 use std::env;
diff --git a/src/main.rs b/src/main.rs
index d418d2daa31..7a78b32620d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,7 +2,6 @@
 // warn on lints, that are included in `rust-lang/rust`s bootstrap
 #![warn(rust_2018_idioms, unused_lifetimes)]
 
-use rustc_tools_util::VersionInfo;
 use std::env;
 use std::path::PathBuf;
 use std::process::{self, Command};