Remove AsyncOwner

crates/ra_syntax/src/ast/extensions.rs

@@ -221,6 +221,10 @@ impl ast::FnDef {
             .and_then(|it| it.into_token())
             .filter(|it| it.kind() == T![;])
     }
+
+    pub fn is_async(&self) -> bool {
+        self.syntax().children_with_tokens().any(|it| it.kind() == T![async])
+    }
 }
 
 impl ast::LetStmt {

crates/ra_syntax/src/ast/generated.rs

@@ -1129,7 +1129,6 @@ impl ast::NameOwner for FnDef {}
 impl ast::TypeParamsOwner for FnDef {}
 impl ast::AttrsOwner for FnDef {}
 impl ast::DocCommentsOwner for FnDef {}
-impl ast::AsyncOwner for FnDef {}
 impl FnDef {
     pub fn param_list(&self) -> Option<ParamList> {
         AstChildren::new(&self.syntax).next()

crates/ra_syntax/src/ast/traits.rs

@@ -8,7 +8,6 @@ use crate::{
     ast::{self, child_opt, children, AstChildren, AstNode, AstToken},
     match_ast,
     syntax_node::{SyntaxElementChildren, SyntaxNodeChildren},
-    SyntaxKind,
 };
 
 pub trait TypeAscriptionOwner: AstNode {
@@ -106,12 +105,6 @@ pub trait AttrsOwner: AstNode {
     }
 }
 
-pub trait AsyncOwner: AstNode {
-    fn is_async(&self) -> bool {
-        self.syntax().children_with_tokens().any(|t| t.kind() == SyntaxKind::ASYNC_KW)
-    }
-}
-
 pub trait DocCommentsOwner: AstNode {
     fn doc_comments(&self) -> CommentIter {
         CommentIter { iter: self.syntax().children_with_tokens() }

crates/ra_syntax/src/grammar.ron

@@ -275,8 +275,7 @@ Grammar(
                 "NameOwner",
                 "TypeParamsOwner",
                 "AttrsOwner",
-                "DocCommentsOwner",
-                "AsyncOwner"
+                "DocCommentsOwner"
             ],
             options: [ "ParamList", ["body", "BlockExpr"], "RetType" ],
         ),