Revert "fix: GPU scheduling issue (Netflix#1520)" (Netflix#1542)

This reverts commit 2465915.

metaflow/plugins/kubernetes/kubernetes_decorator.py

@@ -270,11 +270,6 @@ def step_init(self, flow, graph, step, decos, environment, flow_datastore, logge
                 )
             )
 
-        # Treat gpu=0 as non-requests, but rewrite this as None for simpler handling in Kubernetes job/Argo Workflow templates.
-        # This is important, as adding a gpu limit with a value of 0 will be preferred for gpu nodes by the scheduler.
-        if self.attributes["gpu"] is not None and int(self.attributes["gpu"]) == 0:
-            self.attributes["gpu"] = None
-
         if self.attributes["tmpfs_size"]:
             if not (
                 isinstance(self.attributes["tmpfs_size"], (int, unicode, basestring))