Adapt ui test of #50092 to beta

* Changed `// compile-pass` to `// must-compile-successfully`
* Removed checks on unstable features

Author: pietroalbini

src/test/ui/issue-49934.rs

@@ -8,12 +8,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// compile-pass
+// must-compile-successfully
 
-#![feature(stmt_expr_attributes)]
 #![warn(unused_attributes)] //~ NOTE lint level defined here
 
-fn foo<#[derive(Debug)] T>() { //~ WARN unused attribute
+fn foo() {
     match 0 {
         #[derive(Debug)] //~ WARN unused attribute
         _ => (),
@@ -40,10 +39,6 @@ fn main() {
     #[derive(Debug)] //~ WARN unused attribute
     let _ = "Hello, world!";
 
-    // fold_expr
-    let _ = #[derive(Debug)] "Hello, world!";
-    //~^ WARN unused attribute
-
     let _ = [
         // fold_opt_expr
         #[derive(Debug)] //~ WARN unused attribute

src/test/ui/issue-49934.stderr

@@ -1,49 +1,37 @@
 warning: `#[derive]` does nothing on macro invocations
-  --> $DIR/issue-49934.rs:30:5
+  --> $DIR/issue-49934.rs:29:5
    |
 LL |     #[derive(Debug)]
    |     ^^^^^^^^^^^^^^^^
    |
    = note: this may become a hard error in a future release
 
 warning: unused attribute
-  --> $DIR/issue-49934.rs:16:8
+  --> $DIR/issue-49934.rs:17:9
    |
-LL | fn foo<#[derive(Debug)] T>() { //~ WARN unused attribute
-   |        ^^^^^^^^^^^^^^^^
+LL |         #[derive(Debug)] //~ WARN unused attribute
+   |         ^^^^^^^^^^^^^^^^
    |
 note: lint level defined here
-  --> $DIR/issue-49934.rs:14:9
+  --> $DIR/issue-49934.rs:13:9
    |
 LL | #![warn(unused_attributes)] //~ NOTE lint level defined here
    |         ^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-49934.rs:18:9
-   |
-LL |         #[derive(Debug)] //~ WARN unused attribute
-   |         ^^^^^^^^^^^^^^^^
-
-warning: unused attribute
-  --> $DIR/issue-49934.rs:36:5
+  --> $DIR/issue-49934.rs:35:5
    |
 LL |     #[derive(Debug)] //~ WARN unused attribute
    |     ^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-49934.rs:40:5
+  --> $DIR/issue-49934.rs:39:5
    |
 LL |     #[derive(Debug)] //~ WARN unused attribute
    |     ^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-49934.rs:44:13
-   |
-LL |     let _ = #[derive(Debug)] "Hello, world!";
-   |             ^^^^^^^^^^^^^^^^
-
-warning: unused attribute
-  --> $DIR/issue-49934.rs:49:9
+  --> $DIR/issue-49934.rs:44:9
    |
 LL |         #[derive(Debug)] //~ WARN unused attribute
    |         ^^^^^^^^^^^^^^^^