Remove console.error for login

Summary:
This is in fact correctly handled, shown in the UI and we don't
need a task if someone pastes the wrong token.

Reviewed By: priteshrnandgaonkar

Differential Revision: D28569896

fbshipit-source-id: 689bff06b4a488be7ad4c58eb4f2e91018da31cf

desktop/app/src/chrome/SignInSheet.tsx

@@ -74,7 +74,6 @@ class SignInSheet extends Component<Props, State> {
       this.setState({loading: false});
       this.props.onHide();
     } catch (error) {
-      console.error(error);
       this.setState({
         loading: false,
         error: `${error}`,