remove unnecessary stderr files

src/test/ui/associated-types/higher-ranked-projection.badbase.stderr

@@ -1,17 +0,0 @@
-error[E0308]: mismatched types
-  --> $DIR/higher-ranked-projection.rs:25:5
-   |
-LL |     foo(());
-   |     ^^^^^^^ one type is more general than the other
-   |
-   = note: expected reference `&'a ()`
-              found reference `&()`
-note: the lifetime requirement is introduced here
-  --> $DIR/higher-ranked-projection.rs:16:33
-   |
-LL |     where for<'a> &'a T: Mirror<Image=U>
-   |                                 ^^^^^^^
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0308`.

src/test/ui/associated-types/higher-ranked-projection.badnll.stderr

@@ -1,2 +0,0 @@
-error: unknown debugging option: `borrowck`
-

src/test/ui/lub-glb/old-lub-glb-hr-noteq1.nllleak.stderr

@@ -1,2 +0,0 @@
-error: unknown debugging option: `borrowck`
-

src/test/ui/lub-glb/old-lub-glb-hr-noteq1.nllnoleak.stderr

@@ -1,2 +0,0 @@
-error: unknown debugging option: `borrowck`
-