Remove torchvision and torchaudio dependency when testing userbenchma…

…rk. (#2309)

Summary:
Most userbenchmarks handle dependencies themselves, and torchvision/torchaudio are not required.

Pull Request resolved: #2309

Reviewed By: aaronenyeshi

Differential Revision: D58686618

Pulled By: xuzhao9

fbshipit-source-id: b6ad66333586e237ef115c2c39c0069e4cb58450

install.py

@@ -55,6 +55,8 @@ def pip_install_requirements(requirements_txt="requirements.txt"):
         end="",
         flush=True,
     )
+    if args.userbenchmark:
+        TORCH_DEPS = ["torch"]
     try:
         versions = get_pkg_versions(TORCH_DEPS)
     except ModuleNotFoundError as e: