remove mock-nvidia customization from file plugin

Author: tehut

plugins/device/cmd/example/cmd/main.go

@@ -4,8 +4,6 @@
 package main
 
 import (
-	"context"
-
 	log "github.com/hashicorp/go-hclog"
 
 	"github.com/hashicorp/nomad/plugins"
@@ -19,6 +17,5 @@ func main() {
 
 // factory returns a new instance of our example device plugin
 func factory(log log.Logger) interface{} {
-	ctx := context.Background()
-	return example.NewNvidiaDevice(ctx, log)
+	return example.NewExampleDevice(log)
 }