Update tests where we don't report errors twice anymore

Author: nikomatsakis

src/test/compile-fail/regions-name-duplicated.rs

@@ -9,7 +9,6 @@
 // except according to those terms.
 
 struct Foo<'a, 'a> { //~ ERROR lifetime name `'a` declared twice
-//~^ ERROR lifetime name `'a` declared twice
     x: &'a int
 }
 

src/test/compile-fail/regions-name-static.rs

@@ -9,7 +9,6 @@
 // except according to those terms.
 
 struct Foo<'static> { //~ ERROR illegal lifetime parameter name: `'static`
-//~^ ERROR illegal lifetime parameter name: `'static`
     x: &'static int
 }