Remove pinning against torch version (#4171)

Author: NicolasHug

setup.py

@@ -86,8 +86,12 @@ def _main():
     print("-- Git branch:", branch)
     print("-- Git SHA:", sha)
     print("-- Git tag:", tag)
-    pytorch_package_dep = _get_pytorch_version()
-    print("-- PyTorch dependency:", pytorch_package_dep)
+    # This used to be passed to install_requires
+    # which would cause pinning against a specific torch version in releases.
+    # I don't think we want to pin at all?
+    # TODO: revisit if needed. Maybe it's needed for nightlies. Unsure.
+    # pytorch_package_dep = _get_pytorch_version()
+    # print("-- PyTorch dependency:", pytorch_package_dep)
     version = _get_version(sha)
     print("-- Building version", version)
 
@@ -135,7 +139,7 @@ def _main():
             "build_ext": setup_helpers.get_build_ext(),
             "clean": clean,
         },
-        install_requires=[pytorch_package_dep],
+        install_requires=[],
         zip_safe=False,
     )