remove const_fn feature gate from const tests

Author: RalfJung

src/test/ui/array-slice-vec/subslice-patterns-const-eval-match.rs

@@ -2,8 +2,6 @@
 
 // run-pass
 
-#![feature(const_fn)]
-
 #[derive(PartialEq, Debug, Clone)]
 struct N(u8);
 

src/test/ui/associated-consts/associated-const-in-trait.rs

@@ -1,6 +1,6 @@
 // #29924
 
-#![feature(const_fn, associated_consts)]
+#![feature(associated_consts)]
 
 trait Trait {
     const N: usize;

src/test/ui/consts/const-eval/auxiliary/stability.rs

@@ -3,7 +3,6 @@
 #![crate_type="rlib"]
 #![stable(feature = "rust1", since = "1.0.0")]
 
-#![feature(const_fn)]
 #![feature(staged_api)]
 
 #[stable(feature = "rust1", since = "1.0.0")]

src/test/ui/consts/const-eval/const_fn_ptr.rs

@@ -1,6 +1,5 @@
 // run-pass
 // compile-flags: -Zunleash-the-miri-inside-of-you
-#![feature(const_fn)]
 
 fn double(x: usize) -> usize { x * 2 }
 const fn double_const(x: usize) -> usize { x * 2 }

src/test/ui/consts/const-eval/const_fn_ptr.stderr

@@ -1,27 +1,27 @@
 warning: skipping const checks
    |
 help: skipping check that does not even have a feature gate
-  --> $DIR/const_fn_ptr.rs:12:5
+  --> $DIR/const_fn_ptr.rs:11:5
    |
 LL |     X(x)
    |     ^^^^
 help: skipping check that does not even have a feature gate
-  --> $DIR/const_fn_ptr.rs:16:5
+  --> $DIR/const_fn_ptr.rs:15:5
    |
 LL |     X_CONST(x)
    |     ^^^^^^^^^^
 help: skipping check for `const_fn_fn_ptr_basics` feature
-  --> $DIR/const_fn_ptr.rs:19:14
+  --> $DIR/const_fn_ptr.rs:18:14
    |
 LL | const fn foo(x: fn(usize) -> usize, y: usize)  -> usize {
    |              ^
 help: skipping check for `const_fn_fn_ptr_basics` feature
-  --> $DIR/const_fn_ptr.rs:20:5
+  --> $DIR/const_fn_ptr.rs:19:5
    |
 LL |     x(y)
    |     ^
 help: skipping check that does not even have a feature gate
-  --> $DIR/const_fn_ptr.rs:20:5
+  --> $DIR/const_fn_ptr.rs:19:5
    |
 LL |     x(y)
    |     ^^^^

src/test/ui/consts/const-eval/const_fn_ptr_fail.rs

@@ -1,6 +1,5 @@
 // run-pass
 // compile-flags: -Zunleash-the-miri-inside-of-you
-#![feature(const_fn)]
 #![allow(unused)]
 
 fn double(x: usize) -> usize { x * 2 }

src/test/ui/consts/const-eval/const_fn_ptr_fail.stderr

@@ -1,7 +1,7 @@
 warning: skipping const checks
    |
 help: skipping check that does not even have a feature gate
-  --> $DIR/const_fn_ptr_fail.rs:10:5
+  --> $DIR/const_fn_ptr_fail.rs:9:5
    |
 LL |     X(x) // FIXME: this should error someday
    |     ^^^^

src/test/ui/consts/const-eval/const_fn_ptr_fail2.rs

@@ -1,7 +1,6 @@
 // build-fail
 // compile-flags: -Zunleash-the-miri-inside-of-you
 
-#![feature(const_fn)]
 #![allow(const_err)]
 
 fn double(x: usize) -> usize {

src/test/ui/consts/const-eval/const_fn_ptr_fail2.stderr

@@ -1,29 +1,29 @@
 error[E0080]: evaluation of constant value failed
-  --> $DIR/const_fn_ptr_fail2.rs:20:16
+  --> $DIR/const_fn_ptr_fail2.rs:19:16
    |
 LL |     assert_eq!(Y, 4);
    |                ^ referenced constant has errors
 
 error[E0080]: evaluation of constant value failed
-  --> $DIR/const_fn_ptr_fail2.rs:22:16
+  --> $DIR/const_fn_ptr_fail2.rs:21:16
    |
 LL |     assert_eq!(Z, 4);
    |                ^ referenced constant has errors
 
 warning: skipping const checks
    |
 help: skipping check for `const_fn_fn_ptr_basics` feature
-  --> $DIR/const_fn_ptr_fail2.rs:12:14
+  --> $DIR/const_fn_ptr_fail2.rs:11:14
    |
 LL | const fn bar(x: fn(usize) -> usize, y: usize) -> usize {
    |              ^
 help: skipping check for `const_fn_fn_ptr_basics` feature
-  --> $DIR/const_fn_ptr_fail2.rs:13:5
+  --> $DIR/const_fn_ptr_fail2.rs:12:5
    |
 LL |     x(y)
    |     ^
 help: skipping check that does not even have a feature gate
-  --> $DIR/const_fn_ptr_fail2.rs:13:5
+  --> $DIR/const_fn_ptr_fail2.rs:12:5
    |
 LL |     x(y)
    |     ^^^^

src/test/ui/consts/const-eval/dont_promote_unstable_const_fn.rs

@@ -3,7 +3,6 @@
             we're apparently really bad at it",
             issue = "none")]
 
-#![feature(const_fn)]
 #![feature(staged_api)]
 
 #[stable(feature = "rust1", since = "1.0.0")]