Prune dependencies.

Author: cjgillot

Cargo.lock

@@ -4043,10 +4043,8 @@ dependencies = [
  "log",
  "parking_lot 0.9.0",
  "rustc-rayon-core",
- "rustc_ast",
  "rustc_data_structures",
  "rustc_errors",
- "rustc_hir",
  "rustc_index",
  "rustc_macros",
  "rustc_session",

src/librustc_query_system/Cargo.toml

@@ -12,10 +12,8 @@ doctest = false
 [dependencies]
 log = { version = "0.4", features = ["release_max_level_info", "std"] }
 rustc-rayon-core = "0.3.0"
-rustc_ast = { path = "../librustc_ast" }
 rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_errors = { path = "../librustc_errors" }
-rustc_hir = { path = "../librustc_hir" }
 rustc_index = { path = "../librustc_index" }
 rustc_macros = { path = "../librustc_macros" }
 rustc_serialize = { path = "../libserialize", package = "serialize" }

src/librustc_query_system/query/config.rs

@@ -7,7 +7,7 @@ use crate::query::job::{QueryJobId, QueryJobInfo};
 use crate::query::plumbing::CycleError;
 use crate::query::QueryState;
 use rustc_data_structures::profiling::ProfileCategory;
-use rustc_hir::def_id::DefId;
+use rustc_span::def_id::DefId;
 
 use rustc_data_structures::fingerprint::Fingerprint;
 use rustc_data_structures::fx::FxHashMap;