Remove references and checks for --gpus

No way to test this unless running on a nvidia platform.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

cmd/podman/containers/run.go

@@ -247,8 +247,5 @@ func run(cmd *cobra.Command, args []string) error {
 			}
 		}
 	}
-	if cmd.Flag("gpus").Changed {
-		logrus.Info("--gpus is a Docker specific option and is a NOOP")
-	}
 	return nil
 }

hack/xref-docker-options

@@ -14,7 +14,6 @@ declare -a hidden=(
     "docker -D"                          # Hidden
     "docker -H"                          # Hidden
 
-    "docker .* --gpus"                   # Not likely to be implemented
     "docker .* --isolation"              # Only for Windows containers
     "docker .* --kernel-memory"          # CGroupsV1 only, present but hidden
     "docker .* --link"                   # Deprecated in docker