Remove dead code

crates/ra_syntax/src/ast.rs

@@ -90,7 +90,7 @@ mod support {
         AstChildren::new(parent)
     }
 
-    pub(super) fn token2(parent: &SyntaxNode, kind: SyntaxKind) -> Option<SyntaxToken> {
+    pub(super) fn token(parent: &SyntaxNode, kind: SyntaxKind) -> Option<SyntaxToken> {
         parent.children_with_tokens().filter_map(|it| it.into_token()).find(|it| it.kind() == kind)
     }
 }