Rollup merge of #95401 - c410-f3r:moar-tests, r=petrochenkov

Remove duplicated and unused test files

cc https://github.com/rust-lang/rust/issues/73494
r? `@petrochenkov`

src/test/ui/auxiliary/empty-struct.rs

@@ -1,9 +0,0 @@
-pub struct XEmpty1 {}
-pub struct XEmpty2;
-pub struct XEmpty6();
-
-pub enum XE {
-    XEmpty3 {},
-    XEmpty4,
-    XEmpty5(),
-}

src/test/ui/auxiliary/stability-cfg2.rs

@@ -1,5 +0,0 @@
-// compile-flags:--cfg foo
-
-#![cfg_attr(foo, unstable(feature = "unstable_test_feature", issue = "none"))]
-#![cfg_attr(not(foo), stable(feature = "test_feature", since = "1.0.0"))]
-#![feature(staged_api)]

src/test/ui/auxiliary/weak-lang-items.rs

@@ -1,22 +0,0 @@
-// no-prefer-dynamic
-
-// This aux-file will require the eh_personality function to be codegen'd, but
-// it hasn't been defined just yet. Make sure we don't explode.
-
-#![no_std]
-#![crate_type = "rlib"]
-
-struct A;
-
-impl core::ops::Drop for A {
-    fn drop(&mut self) {}
-}
-
-pub fn foo() {
-    let _a = A;
-    panic!("wut");
-}
-
-mod std {
-    pub use core::{option, fmt};
-}

src/test/ui/cross-crate/auxiliary/anon_trait_static_method_lib.rs

@@ -1,9 +0,0 @@
-pub struct Foo {
-    pub x: isize
-}
-
-impl Foo {
-    pub fn new() -> Foo {
-        Foo { x: 3 }
-    }
-}

src/test/ui/cross-crate/auxiliary/newtype_struct_xc.rs

@@ -1,3 +0,0 @@
-#![crate_type="lib"]
-
-pub struct Au(pub isize);

src/test/ui/cross-crate/auxiliary/xcrate_unit_struct.rs

@@ -1,28 +0,0 @@
-#![crate_type = "lib"]
-
-// used by the rpass test
-
-#[derive(Copy, Clone)]
-pub struct Struct;
-
-#[derive(Copy, Clone)]
-pub enum Unit {
-    UnitVariant,
-    Argument(Struct)
-}
-
-#[derive(Copy, Clone)]
-pub struct TupleStruct(pub usize, pub &'static str);
-
-// used by the cfail test
-
-#[derive(Copy, Clone)]
-pub struct StructWithFields {
-    foo: isize,
-}
-
-#[derive(Copy, Clone)]
-pub enum EnumWithVariants {
-    EnumVariant,
-    EnumVariantArg(isize)
-}

src/test/ui/issues/auxiliary/empty-struct.rs

@@ -1,9 +0,0 @@
-pub struct XEmpty1 {}
-pub struct XEmpty2;
-pub struct XEmpty6();
-
-pub enum XE {
-    XEmpty3 {},
-    XEmpty4,
-    XEmpty5(),
-}

src/test/ui/issues/issue-51244.rs

@@ -1,4 +0,0 @@
-fn main() {
-    let ref my_ref @ _ = 0;
-    *my_ref = 0; //~ ERROR cannot assign to `*my_ref`, which is behind a `&` reference [E0594]
-}

src/test/ui/issues/issue-51244.stderr

@@ -1,11 +0,0 @@
-error[E0594]: cannot assign to `*my_ref`, which is behind a `&` reference
-  --> $DIR/issue-51244.rs:3:5
-   |
-LL |     let ref my_ref @ _ = 0;
-   |         -------------- help: consider changing this to be a mutable reference: `ref mut my_ref @ _`
-LL |     *my_ref = 0;
-   |     ^^^^^^^^^^^ `my_ref` is a `&` reference, so the data it refers to cannot be written
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0594`.

src/test/ui/regions/regions-enum-not-wf.rs

@@ -1,39 +0,0 @@
-// Various examples of structs whose fields are not well-formed.
-
-#![allow(dead_code)]
-
-trait Dummy<'a> {
-    type Out;
-}
-impl<'a, T> Dummy<'a> for T
-where
-    T: 'a,
-{
-    type Out = ();
-}
-type RequireOutlives<'a, T> = <T as Dummy<'a>>::Out;
-
-enum Ref1<'a, T> {
-    Ref1Variant1(RequireOutlives<'a, T>), //~ ERROR the parameter type `T` may not live long enough
-}
-
-enum Ref2<'a, T> {
-    Ref2Variant1,
-    Ref2Variant2(isize, RequireOutlives<'a, T>), //~ ERROR the parameter type `T` may not live long enough
-}
-
-enum RefOk<'a, T: 'a> {
-    RefOkVariant1(&'a T),
-}
-
-// This is now well formed. RFC 2093
-enum RefIndirect<'a, T> {
-    RefIndirectVariant1(isize, RefOk<'a, T>),
-}
-
-enum RefDouble<'a, 'b, T> {
-    RefDoubleVariant1(&'a RequireOutlives<'b, T>),
-    //~^ the parameter type `T` may not live long enough [E0309]
-}
-
-fn main() {}

src/test/ui/regions/regions-enum-not-wf.stderr

@@ -1,28 +0,0 @@
-error[E0309]: the parameter type `T` may not live long enough
-  --> $DIR/regions-enum-not-wf.rs:17:18
-   |
-LL | enum Ref1<'a, T> {
-   |               - help: consider adding an explicit lifetime bound...: `T: 'a`
-LL |     Ref1Variant1(RequireOutlives<'a, T>),
-   |                  ^^^^^^^^^^^^^^^^^^^^^^ ...so that the type `T` will meet its required lifetime bounds
-
-error[E0309]: the parameter type `T` may not live long enough
-  --> $DIR/regions-enum-not-wf.rs:22:25
-   |
-LL | enum Ref2<'a, T> {
-   |               - help: consider adding an explicit lifetime bound...: `T: 'a`
-LL |     Ref2Variant1,
-LL |     Ref2Variant2(isize, RequireOutlives<'a, T>),
-   |                         ^^^^^^^^^^^^^^^^^^^^^^ ...so that the type `T` will meet its required lifetime bounds
-
-error[E0309]: the parameter type `T` may not live long enough
-  --> $DIR/regions-enum-not-wf.rs:35:23
-   |
-LL | enum RefDouble<'a, 'b, T> {
-   |                        - help: consider adding an explicit lifetime bound...: `T: 'b`
-LL |     RefDoubleVariant1(&'a RequireOutlives<'b, T>),
-   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ ...so that the type `T` will meet its required lifetime bounds
-
-error: aborting due to 3 previous errors
-
-For more information about this error, try `rustc --explain E0309`.

src/test/ui/span/E0057.rs

@@ -1,6 +0,0 @@
-fn main() {
-    let f = |x| x * 3;
-    let a = f(); //~ ERROR E0057
-    let b = f(4);
-    let c = f(2, 3); //~ ERROR E0057
-}

src/test/ui/span/E0057.stderr

@@ -1,19 +0,0 @@
-error[E0057]: this function takes 1 argument but 0 arguments were supplied
-  --> $DIR/E0057.rs:3:13
-   |
-LL |     let a = f();
-   |             ^-- supplied 0 arguments
-   |             |
-   |             expected 1 argument
-
-error[E0057]: this function takes 1 argument but 2 arguments were supplied
-  --> $DIR/E0057.rs:5:13
-   |
-LL |     let c = f(2, 3);
-   |             ^ -  - supplied 2 arguments
-   |             |
-   |             expected 1 argument
-
-error: aborting due to 2 previous errors
-
-For more information about this error, try `rustc --explain E0057`.

src/test/ui/suggestions/auxiliary/struct_field_privacy.rs

@@ -1,9 +0,0 @@
-pub struct A {
-    a: isize,
-    pub b: isize,
-}
-
-pub struct B {
-    pub a: isize,
-    b: isize,
-}