5 files changed, 6 insertions, 13 deletions

diff --git a/crates/ra_hir_def/src/data.rs b/crates/ra_hir_def/src/data.rs
index a1b31c411..c900a6a18 100644
--- a/crates/ra_hir_def/src/data.rs
+++ b/crates/ra_hir_def/src/data.rs
@@ -6,9 +6,7 @@ use hir_expand::{
     name::{name, AsName, Name},
     AstId, InFile,
 };
-use ra_syntax::ast::{
-    self, AstNode, AsyncOwner, ImplItem, ModuleItemOwner, NameOwner, TypeAscriptionOwner,
-};
+use ra_syntax::ast::{self, AstNode, ImplItem, ModuleItemOwner, NameOwner, TypeAscriptionOwner};
 
 use crate::{
     db::DefDatabase,
diff --git a/crates/ra_syntax/src/ast/extensions.rs b/crates/ra_syntax/src/ast/extensions.rs
index a8f625176..baaef3023 100644
--- a/crates/ra_syntax/src/ast/extensions.rs
+++ b/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 {
diff --git a/crates/ra_syntax/src/ast/generated.rs b/crates/ra_syntax/src/ast/generated.rs
index 73e1c407c..9f9d6e63c 100644
--- a/crates/ra_syntax/src/ast/generated.rs
+++ b/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()
diff --git a/crates/ra_syntax/src/ast/traits.rs b/crates/ra_syntax/src/ast/traits.rs
index 8bf6aa2f0..f99984fe0 100644
--- a/crates/ra_syntax/src/ast/traits.rs
+++ b/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() }
diff --git a/crates/ra_syntax/src/grammar.ron b/crates/ra_syntax/src/grammar.ron
index 7d11f0176..08aafb610 100644
--- a/crates/ra_syntax/src/grammar.ron
+++ b/crates/ra_syntax/src/grammar.ron
@@ -275,8 +275,7 @@ Grammar(
                 "NameOwner",
                 "TypeParamsOwner",
                 "AttrsOwner",
-                "DocCommentsOwner",
-                "AsyncOwner"
+                "DocCommentsOwner"
             ],
             options: [ "ParamList", ["body", "BlockExpr"], "RetType" ],
         ),