[llvm] [GitHub] Remove pr-subscriber-wait.py download (PR #72120)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

After seeing this patch, I was wondering why the job didn't just outright fail. Apparently curl doesn't return a non-zero exit code for HTTP requests that return a code other than 200.

https://github.com/llvm/llvm-project/pull/72120