Add #![allow(..)] as necessary to get re-migrated run-pass tests compiling with clean stderr again.

Most were added mechanically.

Author: pnkfelix

src/test/run-pass/array-slice-vec/array_const_index-1.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // run-pass
+#![allow(dead_code)]
 #![allow(stable_features)]
 
 #![feature(const_indexing)]

src/test/run-pass/array-slice-vec/check-static-mut-slices.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // run-pass
+#![allow(dead_code)]
 
 // Checks that mutable static items can have mutable slices
 

src/test/run-pass/array-slice-vec/evec-slice.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // run-pass
+#![allow(unused_assignments)]
 
 pub fn main() {
     let x : &[isize] = &[1,2,3,4,5];

src/test/run-pass/array-slice-vec/slice.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // run-pass
+#![allow(unused_variables)]
 
 // Test slicing sugar.
 

src/test/run-pass/array-slice-vec/vec-late-init.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // run-pass
+#![allow(unused_mut)]
 
 
 pub fn main() {

src/test/run-pass/array-slice-vec/vec-macro-with-brackets.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // run-pass
+#![allow(unused_variables)]
 
 // pretty-expanded FIXME #23616
 

src/test/run-pass/array-slice-vec/vec-matching-legal-tail-element-borrow.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // run-pass
+#![allow(unused_variables)]
 
 #![feature(slice_patterns)]
 

src/test/run-pass/associated-consts/associated-const-range-match-patterns.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // run-pass
+#![allow(dead_code)]
 
 struct Foo;
 

src/test/run-pass/associated-types/associated-types-cc.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // run-pass
+#![allow(unused_variables)]
 // aux-build:associated-types-cc-lib.rs
 
 // Test that we are able to reference cross-crate traits that employ

src/test/run-pass/associated-types/associated-types-duplicate-binding-in-env-hrtb.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // run-pass
+#![allow(dead_code)]
 // Check that we do not report ambiguities when equivalent predicates
 // (modulo bound lifetime names) appears in the environment
 // twice. Issue #21965.