Revert "Add unnecessary unsafe test"

This reverts commit 46377c4.

Author: camsteffen

src/test/ui/unsafe/unsafe-around-compiler-generated-unsafe.mir.stderr

@@ -10,11 +10,5 @@ note: the lint level is defined here
 LL | #![deny(unused_unsafe)]
    |         ^^^^^^^^^^^^^
 
-error: unnecessary `unsafe` block
-  --> $DIR/unsafe-around-compiler-generated-unsafe.rs:13:5
-   |
-LL |     unsafe { println!("foo"); }
-   |     ^^^^^^ unnecessary `unsafe` block
-
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 

src/test/ui/unsafe/unsafe-around-compiler-generated-unsafe.rs

@@ -8,7 +8,4 @@ fn main() {
     let _ = async {
         unsafe { async {}.await; } //~ ERROR unnecessary `unsafe`
     };
-
-    // `format_args!` expands with a compiler-generated unsafe block
-    unsafe { println!("foo"); } //~ ERROR unnecessary `unsafe`
 }

src/test/ui/unsafe/unsafe-around-compiler-generated-unsafe.thir.stderr

@@ -10,11 +10,5 @@ note: the lint level is defined here
 LL | #![deny(unused_unsafe)]
    |         ^^^^^^^^^^^^^
 
-error: unnecessary `unsafe` block
-  --> $DIR/unsafe-around-compiler-generated-unsafe.rs:13:5
-   |
-LL |     unsafe { println!("foo"); }
-   |     ^^^^^^ unnecessary `unsafe` block
-
-error: aborting due to 2 previous errors
+error: aborting due to previous error