fix(directline): remove unused files

Author: harshithkashyap

.gitignore

@@ -1,4 +1,4 @@
 /.env
 /dist
 /lib
-/node_modules
+/node_modules

__tests__/happy.uploadAttachments.js

@@ -113,4 +113,4 @@ describe('Happy path', () => {
       ]);
     });
   });
-});
+});