Remove now stable tool_attributes feature

Author: flip1995

clippy_lints/src/lib.rs

@@ -8,10 +8,8 @@
 #![feature(macro_vis_matcher)]
 #![allow(unknown_lints, shadow_reuse, missing_docs_in_private_items)]
 #![recursion_limit = "256"]
-#![allow(stable_features)]
 #![feature(iterator_find_map)]
 #![feature(macro_at_most_once_rep)]
-#![feature(tool_attributes)]
 #![warn(rust_2018_idioms)]
 
 use toml;

tests/needless_continue_helpers.rs

@@ -1,4 +1,4 @@
-#![feature(tool_attributes)]
+
 
 // Tests for the various helper functions used by the needless_continue
 // lint that don't belong in utils.

tests/trim_multiline.rs

@@ -1,4 +1,4 @@
-#![feature(tool_attributes)]
+
 
 /// test the multiline-trim function
 extern crate clippy_lints;

tests/ui/author.rs

@@ -1,4 +1,4 @@
-#![feature(tool_attributes)]
+
 
 fn main() {
 

tests/ui/author/call.rs

@@ -1,4 +1,4 @@
-#![feature(tool_attributes)]
+
 
 fn main() {
     #[clippy::author]

tests/ui/author/for_loop.rs

@@ -1,4 +1,4 @@
-#![feature(tool_attributes, stmt_expr_attributes)]
+#![feature(stmt_expr_attributes)]
 
 fn main() {
     #[clippy::author]

tests/ui/cyclomatic_complexity.rs

@@ -1,4 +1,4 @@
-#![feature(tool_attributes)]
+
 
 #![allow(clippy)]
 #![warn(cyclomatic_complexity)]

tests/ui/cyclomatic_complexity_attr_used.rs

@@ -1,4 +1,4 @@
-#![feature(tool_attributes)]
+
 
 #![warn(cyclomatic_complexity)]
 #![warn(unused)]

tests/ui/trailing_zeros.rs

@@ -1,4 +1,4 @@
-#![feature(stmt_expr_attributes, tool_attributes)]
+#![feature(stmt_expr_attributes)]
 
 #![allow(unused_parens)]