remove wrong reference to __init__.py (#1746)

Summary:
Code was moved to run.py

This is more to test https://github.com/pytorch/benchmark/actions/runs/5384553957

Pull Request resolved: #1746

Reviewed By: xuzhao9

Differential Revision: D47306147

Pulled By: janeyx99

fbshipit-source-id: 5fc82327f98f1409ed96ecdeffc2352a7faf6d3b

Author: janeyx99

userbenchmark/optim/run_optim_benchmarks.py

@@ -2,7 +2,7 @@
 '''
 This script is intended for the CI context only! The whole purpose behind this script is to enable
 process/context/memory isolation across different models and devices. The OG script (which this
-script calls) is the userbenchmark/optim/__init__.py script, which is better documented and what is
+script calls) is the userbenchmark/optim/run.py script, which is better documented and what is
 intended to be used locally. The current script is simply a wrapper that dispatches serial 
 subprocesses to run the OG script and handles the metrics.json merging afterwards.