Auto merge of #831 - lzutao:rustup, r=RalfJung

Remove SliceConcatExt import

rustup rust-lang/rust#62403
cc rust-lang/rust#62347

Author: bors

src/shims/intrinsics.rs

@@ -5,7 +5,7 @@ use rustc::ty::layout::{self, LayoutOf, Size};
 use rustc::ty;
 
 use crate::{
-    PlaceTy, OpTy, ImmTy, Immediate, Scalar, ScalarMaybeUndef, Tag,
+    PlaceTy, OpTy, ImmTy, Immediate, Scalar, Tag,
     OperatorEvalContextExt
 };
 

tests/compiletest.rs

@@ -1,8 +1,7 @@
-#![feature(slice_concat_ext, custom_test_frameworks)]
+#![feature(custom_test_frameworks)]
 // Custom test runner, to avoid libtest being wrapped around compiletest which wraps libtest.
 #![test_runner(test_runner)]
 
-use std::slice::SliceConcatExt;
 use std::path::PathBuf;
 use std::env;