Remove windows-specific copy of test

tests/ui/coercion/coerce-issue-49593-box-never-windows.nofallback.stderr

@@ -1,19 +0,0 @@
-error[E0277]: the trait bound `(): std::error::Error` is not satisfied
-  --> $DIR/coerce-issue-49593-box-never-windows.rs:18:53
-   |
-LL |     /* *mut $0 is coerced to Box<dyn Error> here */ Box::<_ /* ! */>::new(x)
-   |                                                     ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::error::Error` is not implemented for `()`
-   |
-   = note: required for the cast from `Box<()>` to `Box<(dyn std::error::Error + 'static)>`
-
-error[E0277]: the trait bound `(): std::error::Error` is not satisfied
-  --> $DIR/coerce-issue-49593-box-never-windows.rs:23:49
-   |
-LL |     /* *mut $0 is coerced to *mut Error here */ raw_ptr_box::<_ /* ! */>(x)
-   |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::error::Error` is not implemented for `()`
-   |
-   = note: required for the cast from `*mut ()` to `*mut (dyn std::error::Error + 'static)`
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0277`.

tests/ui/coercion/coerce-issue-49593-box-never-windows.rs

@@ -1,58 +0,0 @@
-//@ revisions: nofallback fallback
-//@ only-windows - the number of `Error` impls is platform-dependent
-//@[fallback] check-pass
-//@[nofallback] check-fail
-
-#![feature(never_type)]
-#![cfg_attr(fallback, feature(never_type_fallback))]
-#![allow(unreachable_code)]
-
-use std::error::Error;
-use std::mem;
-
-fn raw_ptr_box<T>(t: T) -> *mut T {
-    panic!()
-}
-
-fn foo(x: !) -> Box<dyn Error> {
-    /* *mut $0 is coerced to Box<dyn Error> here */ Box::<_ /* ! */>::new(x)
-    //[nofallback]~^ ERROR trait bound `(): std::error::Error` is not satisfied
-}
-
-fn foo_raw_ptr(x: !) -> *mut dyn Error {
-    /* *mut $0 is coerced to *mut Error here */ raw_ptr_box::<_ /* ! */>(x)
-    //[nofallback]~^ ERROR trait bound `(): std::error::Error` is not satisfied
-}
-
-fn no_coercion(d: *mut dyn Error) -> *mut dyn Error {
-    /* an unsize coercion won't compile here, and it is indeed not used
-       because there is nothing requiring the _ to be Sized */
-    d as *mut _
-}
-
-trait Xyz {}
-struct S;
-struct T;
-impl Xyz for S {}
-impl Xyz for T {}
-
-fn foo_no_never() {
-    let mut x /* : Option<S> */ = None;
-    let mut first_iter = false;
-    loop {
-        if !first_iter {
-            let y: Box<dyn Xyz>
-                = /* Box<$0> is coerced to Box<Xyz> here */ Box::new(x.unwrap());
-        }
-
-        x = Some(S);
-        first_iter = true;
-    }
-
-    let mut y : Option<S> = None;
-    // assert types are equal
-    mem::swap(&mut x, &mut y);
-}
-
-fn main() {
-}

tests/ui/coercion/coerce-issue-49593-box-never.fallback.stderr

@@ -1,5 +1,5 @@
 error[E0277]: the trait bound `(): std::error::Error` is not satisfied
-  --> $DIR/coerce-issue-49593-box-never.rs:19:5
+  --> $DIR/coerce-issue-49593-box-never.rs:18:5
    |
 LL |     Box::<_ /* ! */>::new(x)
    |     ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::error::Error` is not implemented for `()`

tests/ui/coercion/coerce-issue-49593-box-never.nofallback.stderr

@@ -1,5 +1,5 @@
 error[E0277]: the trait bound `(): std::error::Error` is not satisfied
-  --> $DIR/coerce-issue-49593-box-never.rs:19:5
+  --> $DIR/coerce-issue-49593-box-never.rs:18:5
    |
 LL |     Box::<_ /* ! */>::new(x)
    |     ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::error::Error` is not implemented for `()`
@@ -7,10 +7,10 @@ LL |     Box::<_ /* ! */>::new(x)
    = note: required for the cast from `Box<()>` to `Box<(dyn std::error::Error + 'static)>`
 
 error[E0277]: the trait bound `(): std::error::Error` is not satisfied
-  --> $DIR/coerce-issue-49593-box-never.rs:24:49
+  --> $DIR/coerce-issue-49593-box-never.rs:24:5
    |
-LL |     /* *mut $0 is coerced to *mut Error here */ raw_ptr_box::<_ /* ! */>(x)
+LL |     raw_ptr_box::<_ /* ! */>(x)
-   |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::error::Error` is not implemented for `()`
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::error::Error` is not implemented for `()`
    |
    = note: required for the cast from `*mut ()` to `*mut (dyn std::error::Error + 'static)`
 

tests/ui/coercion/coerce-issue-49593-box-never.rs

@@ -1,5 +1,4 @@
 //@ revisions: nofallback fallback
-//@ ignore-windows - the number of `Error` impls is platform-dependent
 //@check-fail
 
 #![feature(never_type)]
@@ -21,13 +20,14 @@ fn foo(x: !) -> Box<dyn Error> {
 }
 
 fn foo_raw_ptr(x: !) -> *mut dyn Error {
-    /* *mut $0 is coerced to *mut Error here */ raw_ptr_box::<_ /* ! */>(x)
+    /* *mut $0 is coerced to *mut Error here */
+    raw_ptr_box::<_ /* ! */>(x)
     //[nofallback]~^ ERROR trait bound `(): std::error::Error` is not satisfied
 }
 
 fn no_coercion(d: *mut dyn Error) -> *mut dyn Error {
     /* an unsize coercion won't compile here, and it is indeed not used
-       because there is nothing requiring the _ to be Sized */
+    because there is nothing requiring the _ to be Sized */
     d as *mut _
 }
 
@@ -50,10 +50,9 @@ fn foo_no_never() {
         first_iter = true;
     }
 
-    let mut y : Option<S> = None;
+    let mut y: Option<S> = None;
     // assert types are equal
     mem::swap(&mut x, &mut y);
 }
 
-fn main() {
+fn main() {}
-}