Revert "Put slicing syntax behind a feature gate."

This reverts commit 95cfc35607.

src/test/bench/shootout-fannkuch-redux.rs

@@ -38,8 +38,6 @@
 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 // OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#![feature(slicing_syntax)]
-
 use std::{cmp, iter, mem};
 use std::sync::Future;
 

src/test/bench/shootout-fasta-redux.rs

@@ -38,8 +38,6 @@
 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 // OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#![feature(slicing_syntax)]
-
 use std::cmp::min;
 use std::io::{stdout, IoResult};
 use std::os;

src/test/bench/shootout-fasta.rs

@@ -38,8 +38,6 @@
 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 // OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#![feature(slicing_syntax)]
-
 use std::io;
 use std::io::{BufferedWriter, File};
 use std::cmp::min;

src/test/bench/shootout-k-nucleotide-pipes.rs

@@ -13,8 +13,6 @@
 
 // multi tasking k-nucleotide
 
-#![feature(slicing_syntax)]
-
 extern crate collections;
 
 use std::collections::HashMap;

src/test/bench/shootout-k-nucleotide.rs

@@ -40,8 +40,6 @@
 
 // ignore-android see #10393 #13206
 
-#![feature(slicing_syntax)]
-
 use std::string::String;
 use std::slice;
 use std::sync::{Arc, Future};

src/test/bench/shootout-regex-dna.rs

@@ -41,7 +41,7 @@
 // ignore-stage1
 // ignore-cross-compile #12102
 
-#![feature(macro_rules, phase, slicing_syntax)]
+#![feature(macro_rules, phase)]
 
 extern crate regex;
 #[phase(plugin)]extern crate regex_macros;

src/test/bench/shootout-reverse-complement.rs

@@ -41,8 +41,6 @@
 // ignore-pretty very bad with line comments
 // ignore-android doesn't terminate?
 
-#![feature(slicing_syntax)]
-
 use std::iter::range_step;
 use std::io::{stdin, stdout, File};
 

src/test/compile-fail/issue-15730.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(slicing_syntax)]
-
 fn main() {
     let mut array = [1, 2, 3];
 //~^ ERROR cannot determine a type for this local variable: cannot determine the type of this integ

src/test/compile-fail/slice-2.rs

@@ -10,8 +10,6 @@
 
 // Test that slicing syntax gives errors if we have not implemented the trait.
 
-#![feature(slicing_syntax)]
-
 struct Foo;
 
 fn main() {

src/test/compile-fail/slice-borrow.rs

@@ -10,8 +10,6 @@
 
 // Test slicing expressions doesn't defeat the borrow checker.
 
-#![feature(slicing_syntax)]
-
 fn main() {
     let y;
     {

src/test/compile-fail/slice-mut-2.rs

@@ -10,8 +10,6 @@
 
 // Test mutability and slicing syntax.
 
-#![feature(slicing_syntax)]
-
 fn main() {
     let x: &[int] = &[1, 2, 3, 4, 5];
     // Can't mutably slice an immutable slice

src/test/compile-fail/slice-mut.rs

@@ -10,8 +10,6 @@
 
 // Test mutability and slicing syntax.
 
-#![feature(slicing_syntax)]
-
 fn main() {
     let x: &[int] = &[1, 2, 3, 4, 5];
     // Immutable slices are not mutable.

src/test/debuginfo/vec-slices.rs

@@ -80,7 +80,6 @@
 // lldb-check:[...]$5 = &[AStruct { x: 10, y: 11, z: 12 }, AStruct { x: 13, y: 14, z: 15 }]
 
 #![allow(unused_variable)]
-#![feature(slicing_syntax)]
 
 struct AStruct {
     x: i16,

src/test/run-pass/issue-3888-2.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(slicing_syntax)]
-
 fn vec_peek<'r, T>(v: &'r [T]) -> &'r [T] {
     v[1..5]
 }

src/test/run-pass/issue-4464.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(slicing_syntax)]
-
 fn broken(v: &[u8], i: uint, j: uint) -> &[u8] { v[i..j] }
 
 pub fn main() {}

src/test/run-pass/issue-8898.rs

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(slicing_syntax)]
 
 extern crate debug;
 

src/test/run-pass/slice-2.rs

@@ -10,8 +10,6 @@
 
 // Test slicing expressions on slices and Vecs.
 
-#![feature(slicing_syntax)]
-
 fn main() {
     let x: &[int] = &[1, 2, 3, 4, 5];
     let cmp: &[int] = &[1, 2, 3, 4, 5];

src/test/run-pass/slice-fail-1.rs

@@ -10,8 +10,6 @@
 
 // Test that is a slicing expr[..] fails, the correct cleanups happen.
 
-#![feature(slicing_syntax)]
-
 use std::task;
 
 struct Foo;

src/test/run-pass/slice-fail-2.rs

@@ -10,8 +10,6 @@
 
 // Test that is a slicing expr[..] fails, the correct cleanups happen.
 
-#![feature(slicing_syntax)]
-
 use std::task;
 
 struct Foo;

src/test/run-pass/slice.rs

@@ -10,8 +10,6 @@
 
 // Test slicing sugar.
 
-#![feature(slicing_syntax)]
-
 extern crate core;
 use core::ops::{Slice,SliceMut};