Remove an incorrect test

It tests the opposite of the correct behavior.

Author: ChayimFriedman2

src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/mbe.rs

@@ -1958,28 +1958,6 @@ fn f() {
     );
 }
 
-#[test]
-fn test_edition_handling_in() {
-    check(
-        r#"
-//- /main.rs crate:main deps:old edition:2021
-fn f() {
-    old::parse_try_old!(try!{});
-}
-//- /old.rs crate:old edition:2015
-#[macro_export]
-macro_rules! parse_try_old {
-    ($it:expr) => {};
-}
- "#,
-        expect![[r#"
-fn f() {
-    ;
-}
-"#]],
-    );
-}
-
 #[test]
 fn semicolon_does_not_glue() {
     check(