Update tests

Author: eholk

src/test/ui/consts/unstable-const-fn-in-libcore.stderr

@@ -1,5 +1,5 @@
 error[E0015]: cannot call non-const closure in constant functions
-  --> $DIR/unstable-const-fn-in-libcore.rs:23:26
+  --> $DIR/unstable-const-fn-in-libcore.rs:22:26
    |
 LL |             Opt::None => f(),
    |                          ^^^
@@ -11,7 +11,7 @@ LL |     const fn unwrap_or_else<F: FnOnce() -> T + ~const std::ops::FnOnce<()>>
    |                                              +++++++++++++++++++++++++++++
 
 error[E0493]: destructors cannot be evaluated at compile-time
-  --> $DIR/unstable-const-fn-in-libcore.rs:18:53
+  --> $DIR/unstable-const-fn-in-libcore.rs:17:53
    |
 LL |     const fn unwrap_or_else<F: FnOnce() -> T>(self, f: F) -> T {
    |                                                     ^ constant functions cannot evaluate destructors
@@ -20,7 +20,7 @@ LL |     }
    |     - value is dropped here
 
 error[E0493]: destructors cannot be evaluated at compile-time
-  --> $DIR/unstable-const-fn-in-libcore.rs:18:47
+  --> $DIR/unstable-const-fn-in-libcore.rs:17:47
    |
 LL |     const fn unwrap_or_else<F: FnOnce() -> T>(self, f: F) -> T {
    |                                               ^^^^ constant functions cannot evaluate destructors

src/test/ui/type-alias-impl-trait/structural-match-no-leak.rs

@@ -1,4 +1,3 @@
-#![feature(const_impl_trait)]
 #![feature(type_alias_impl_trait)]
 
 type Bar = impl Send;

src/test/ui/type-alias-impl-trait/structural-match-no-leak.stderr

@@ -1,5 +1,5 @@
 error: `impl Send` cannot be used in patterns
-  --> $DIR/structural-match-no-leak.rs:15:9
+  --> $DIR/structural-match-no-leak.rs:14:9
    |
 LL |         LEAK_FREE => (),
    |         ^^^^^^^^^

src/test/ui/type-alias-impl-trait/structural-match.rs

@@ -1,4 +1,3 @@
-#![feature(const_impl_trait)]
 #![feature(type_alias_impl_trait)]
 
 type Foo = impl Send;

src/test/ui/type-alias-impl-trait/structural-match.stderr

@@ -1,5 +1,5 @@
 error: `impl Send` cannot be used in patterns
-  --> $DIR/structural-match.rs:16:9
+  --> $DIR/structural-match.rs:15:9
    |
 LL |         VALUE => (),
    |         ^^^^^