Fix linter error.

Author: sean-mcmanus

Extension/src/LanguageServer/client.ts

@@ -2320,11 +2320,10 @@ export class DefaultClient implements Client {
 
         // Don't cancel if the result has already been computed, because the result might still be usable
         // without needing to send an unnecessary re-request, which is the case for the callback to registerRelatedFilesProvider.
-        /*
         if (token.isCancellationRequested) {
-            throw new vscode.CancellationError();
+            return result;
+            // throw new vscode.CancellationError();
         }
-        */
 
         return result;
     }