Update util.py

[paoloemilioserra]

TypeError: 'int' object is not callable

[pajod]

No, just delete the whole thing. Its in the dead space between two fundamentally incompatible requirements:

1. Things that depend on unpredictably distributed values should use random data, which the ill-named secrets module provides.
2. Things that depend on unspecified but reproducible values should ensure a python-version-stable generator with a fixed seed.

Ensuring that carefully timed requests can not defeat a --max-requests mitigation (exhaust server resources on mass worker restart) is clearly in case 1 territory. Ensuring test failures are easy to diagnose is clearly in case 2 territory.

(That is a callable, in the python stdlib. I think your bug is outside of gunicorn code.)