reduce rustc_attr usage in places

Cargo.lock

@@ -4013,7 +4013,6 @@ dependencies = [
  "log",
  "rustc_ast",
  "rustc_ast_pretty",
- "rustc_attr",
  "rustc_data_structures",
  "rustc_errors",
  "rustc_feature",

src/librustc_codegen_llvm/attributes.rs

@@ -21,7 +21,7 @@
 use crate::llvm::AttributePlace::Function;
 use crate::llvm::{self, Attribute};
 use crate::llvm_util;
-pub use rustc_attr::{self as attr, InlineAttr, OptimizeAttr};
+pub use rustc_attr::{InlineAttr, OptimizeAttr};
 
 use crate::context::CodegenCx;
 use crate::value::Value;

src/librustc_parse/Cargo.toml

@@ -13,7 +13,6 @@ doctest = false
 bitflags = "1.0"
 log = "0.4"
 rustc_ast_pretty = { path = "../librustc_ast_pretty" }
-rustc_attr = { path = "../librustc_attr" }
 rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_feature = { path = "../librustc_feature" }
 rustc_lexer = { path = "../librustc_lexer" }