rustc_query_impl: Remove unused dependencies

Author: joshtriplett

Cargo.lock

@@ -4250,20 +4250,13 @@ version = "0.0.0"
 dependencies = [
  "measureme",
  "rustc-rayon-core",
- "rustc_ast",
- "rustc_attr",
  "rustc_data_structures",
  "rustc_errors",
- "rustc_feature",
  "rustc_hir",
- "rustc_index",
- "rustc_macros",
  "rustc_middle",
  "rustc_query_system",
  "rustc_serialize",
- "rustc_session",
  "rustc_span",
- "rustc_target",
  "tracing",
 ]
 

compiler/rustc_query_impl/Cargo.toml

@@ -11,17 +11,10 @@ doctest = false
 measureme = "9.0.0"
 rustc-rayon-core = "0.3.1"
 tracing = "0.1"
-rustc_ast = { path = "../rustc_ast" }
-rustc_attr = { path = "../rustc_attr" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_errors = { path = "../rustc_errors" }
-rustc_feature = { path = "../rustc_feature" }
 rustc_hir = { path = "../rustc_hir" }
-rustc_index = { path = "../rustc_index" }
-rustc_macros = { path = "../rustc_macros" }
 rustc_middle = { path = "../rustc_middle" }
 rustc_query_system = { path = "../rustc_query_system" }
 rustc_span = { path = "../rustc_span" }
 rustc_serialize = { path = "../rustc_serialize" }
-rustc_session = { path = "../rustc_session" }
-rustc_target = { path = "../rustc_target" }