hir is cancelation free

crates/ra_hir/src/code_model_api.rs

@@ -1,7 +1,7 @@
 use std::sync::Arc;
 
 use relative_path::RelativePathBuf;
-use ra_db::{CrateId, Cancelable, FileId};
+use ra_db::{CrateId, FileId};
 use ra_syntax::{ast, TreeArc, SyntaxNode};
 
 use crate::{
@@ -142,10 +142,7 @@ impl Module {
         self.resolve_path_impl(db, path)
     }
 
-    pub fn problems(
-        &self,
-        db: &impl HirDatabase,
-    ) -> Cancelable<Vec<(TreeArc<SyntaxNode>, Problem)>> {
+    pub fn problems(&self, db: &impl HirDatabase) -> Vec<(TreeArc<SyntaxNode>, Problem)> {
         self.problems_impl(db)
     }
 }