Is there a way to remove a delayed side effect of Sculptra that I may be experiencing?

Time is your best friend. Surgery will not necessarily eliminate all the lumps and bumps. Steroids may be of some benefit but are not recommend in the peri-orbital area. 

The most important way to prevent nodule formation around the eyes with Sculptra is to avoid injecting Sculptra close to the eyes in the first place. Once the nodules have developed, they may be difficult to eliminate, but can be helped with a variety of treatment options. Steroid injections, massage, saline infiltration, or even excision can be used, depending on the severity and location.
If the nodules are present within the soft tissues of the lower eyelid, then they may be accessible during a blepharoplasty, but this would depend on the nodules and the patient. It might also depend on if there is another indication for a blepharoplasty, and what incision might be needed. 
A consultation with a facial plastic surgeon, plastic surgeon, or oculoplastic surgeon could be very helpful.
All the best,

Sculptra was originally used for patients with HIV lipodystrophy and is made up of poly-L-lactic acid.  Sculptra has the potential for lasting longer than some other fillers, but it has some significant side effects

-Nodules and Granulomas- Can occur with use of Sculptra.  Knowledge of Sculptra and facial anatomy as well as mixing constitution have resulted in decreased incidence of nodules occurring.  

-Infection- Since Sculptra is replaced ultimately by your body's response to it its incidence of infection is very low

-Overly filled appearance- In some patients the response to Sculptra can be vigorous and patients can note an overly full look to the area injected.  Since Sculptra is not reversible, patients must wait for this product to dissipate which can be years.

Overall, in properly trained hands with an experienced injector, Sculptra can add significant amounts of volume to patients and is a useful filler.

There are certain procedures that can be done that may be able to help your situation.  I would recommend that you see your dermatologist or plastic surgeon.  

I am sorry to learn of the difficulty you are experiencing. If these are effects of Sculptra speak to your physician as there are procedures that can be performed to make you feel more comfortable. Direct massage of the area can have limited success but the sooner it is initiated after the injection the better the chance of success. Injection of Saline by a qualified physician can have the ability to break up granules. "Needling" the granules can break them up as well. Other fillers like Restylane can be used around the granules to camouflage them. Depending upon size the granules can be surgically excised. Lastly I would not use a blepharoplasty alone as a method to remove these grains.