Remove redundant try-catch

src/routes/add-article.ts

@@ -7,7 +7,6 @@ import { termToString } from 'rdf-string';
 import uniqueString from 'unique-string';
 import url from 'url';
 import { AppContext, AppMiddleware } from '../app';
-import NotAnArticle from '../errors/not-an-article';
 import { rdf, schema } from '../namespaces';
 import Routes from './index';
 
@@ -44,15 +43,7 @@ export default (): AppMiddleware => (
       request.dataset.delete(originalQuad).add(newQuad);
     });
 
-    try {
-      await articles.set(newId, request.dataset);
-    } catch (error) {
-      if (error instanceof NotAnArticle) {
-        throw new createHttpError.BadRequest(error.message);
-      }
-
-      throw error;
-    }
+    await articles.set(newId, request.dataset);
 
     response.status = constants.HTTP_STATUS_CREATED;
     response.set('Location', url.resolve(request.origin, router.url(Routes.ArticleList)));