Remove unused functions from ast CoroutineKind

Author: compiler-errors

Diff for: compiler/rustc_ast/src/ast.rs

@@ -2610,14 +2610,6 @@ impl CoroutineKind {
         }
     }
 
-    pub fn is_async(self) -> bool {
-        matches!(self, CoroutineKind::Async { .. })
-    }
-
-    pub fn is_gen(self) -> bool {
-        matches!(self, CoroutineKind::Gen { .. })
-    }
-
     pub fn closure_id(self) -> NodeId {
         match self {
             CoroutineKind::Async { closure_id, .. }

Diff for: src/tools/clippy/clippy_utils/src/ast_utils.rs

@@ -221,7 +221,7 @@ pub fn eq_expr(l: &Expr, r: &Expr) -> bool {
         ) => {
             eq_closure_binder(lb, rb)
                 && lc == rc
-                && la.map_or(false, CoroutineKind::is_async) == ra.map_or(false, CoroutineKind::is_async)
+                && eq_coroutine_kind(*la, *ra)
                 && lm == rm
                 && eq_fn_decl(lf, rf)
                 && eq_expr(le, re)
@@ -241,6 +241,16 @@ pub fn eq_expr(l: &Expr, r: &Expr) -> bool {
     }
 }
 
+fn eq_coroutine_kind(a: Option<CoroutineKind>, b: Option<CoroutineKind>) -> bool {
+    match (a, b) {
+        (Some(CoroutineKind::Async { .. }), Some(CoroutineKind::Async { .. }))
+        | (Some(CoroutineKind::Gen { .. }), Some(CoroutineKind::Gen { .. }))
+        | (Some(CoroutineKind::AsyncGen { .. }), Some(CoroutineKind::AsyncGen { .. }))
+        | (None, None) => true,
+        _ => false,
+    }
+}
+
 pub fn eq_field(l: &ExprField, r: &ExprField) -> bool {
     l.is_placeholder == r.is_placeholder
         && eq_id(l.ident, r.ident)