Remove backtrace silencer for app dir

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145084



Merged-by: Imre Farkas <ifarkas@gitlab.com>
Approved-by: Imre Farkas <ifarkas@gitlab.com>
Approved-by: Aditya Tiwari <atiwari@gitlab.com>
Reviewed-by: Imre Farkas <ifarkas@gitlab.com>
Co-authored-by: Stan Hu <stanhu@gmail.com>