Remove PIP_FIND_LINKS for torch from setup.py (#1019)

- Remove `PIP_FIND_LINKS` for torch in `setup.py`. This was missed by PR #1015 which only removed it in `docker/conda/environments/requirements.txt`.

Authors:
  - Eli Fajardo (https://github.com/efajardo-nv)

Approvers:
  - Michael Demoret (https://github.com/mdemoret-nv)

URL: #1019

setup.py

@@ -21,10 +21,6 @@
 from setuptools import find_packages  # noqa: E402
 from setuptools import setup  # noqa: E402
 
-# Required to install torch via setup.py
-# Note: this is order dependent
-os.environ["PIP_FIND_LINKS"] = "https://download.pytorch.org/whl/cu116/torch_stable.html"
-
 try:
     import versioneer
 except ImportError: