The only thing that comes to mind is to purchase, (unless you already have one) a fine pin punch less than the diameter of the firing pin hole in the bolt face and try to gently tap it out that way. You can also try to reach under the guide through the open slot that guides the firing pin's sear lobe on the side of the hold and try to gently pry it out.
Caution is the key. You don't want to bugger the locking slot for the FP guide that's at the rear of the bolt.
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