Make `ast_to_token_tree` infallible

It could never return `None`, so reflect that in the return type

1 files changed, 4 insertions, 4 deletions

diff --git a/crates/cfg/src/tests.rs b/crates/cfg/src/tests.rs
index bd0f9ec48..d8736c893 100644
--- a/crates/cfg/src/tests.rs
+++ b/crates/cfg/src/tests.rs
@@ -8,7 +8,7 @@ fn assert_parse_result(input: &str, expected: CfgExpr) {
     let (tt, _) = {
         let source_file = ast::SourceFile::parse(input).ok().unwrap();
         let tt = source_file.syntax().descendants().find_map(ast::TokenTree::cast).unwrap();
-        ast_to_token_tree(&tt).unwrap()
+        ast_to_token_tree(&tt)
     };
     let cfg = CfgExpr::parse(&tt);
     assert_eq!(cfg, expected);
@@ -18,7 +18,7 @@ fn check_dnf(input: &str, expect: Expect) {
     let (tt, _) = {
         let source_file = ast::SourceFile::parse(input).ok().unwrap();
         let tt = source_file.syntax().descendants().find_map(ast::TokenTree::cast).unwrap();
-        ast_to_token_tree(&tt).unwrap()
+        ast_to_token_tree(&tt)
     };
     let cfg = CfgExpr::parse(&tt);
     let actual = format!("#![cfg({})]", DnfExpr::new(cfg));
@@ -29,7 +29,7 @@ fn check_why_inactive(input: &str, opts: &CfgOptions, expect: Expect) {
     let (tt, _) = {
         let source_file = ast::SourceFile::parse(input).ok().unwrap();
         let tt = source_file.syntax().descendants().find_map(ast::TokenTree::cast).unwrap();
-        ast_to_token_tree(&tt).unwrap()
+        ast_to_token_tree(&tt)
     };
     let cfg = CfgExpr::parse(&tt);
     let dnf = DnfExpr::new(cfg);
@@ -42,7 +42,7 @@ fn check_enable_hints(input: &str, opts: &CfgOptions, expected_hints: &[&str]) {
     let (tt, _) = {
         let source_file = ast::SourceFile::parse(input).ok().unwrap();
         let tt = source_file.syntax().descendants().find_map(ast::TokenTree::cast).unwrap();
-        ast_to_token_tree(&tt).unwrap()
+        ast_to_token_tree(&tt)
     };
     let cfg = CfgExpr::parse(&tt);
     let dnf = DnfExpr::new(cfg);