Update to use pip

Author: Melvin-klein

objective.py

@@ -32,7 +32,7 @@ class Objective(BaseObjective):
     # solvers or datasets should be declared in Dataset or Solver (see
     # simulated.py and python-gd.py).
     # Example syntax: requirements = ['numpy', 'pip:jax', 'pytorch:pytorch']
-    requirements = ["pytorch:pytorch", "pip:numpy", "pip:deepinv", "pip:pyiqa"]
+    requirements = ["pip:torch", "pip:numpy", "pip:deepinv", "pip:pyiqa"]
 
     # Minimal version of benchopt required to run this benchmark.
     # Bump it up if the benchmark depends on a new feature of benchopt.