You'll need to clamp it down as the bolts may spin when you drill them. Are you going to take the crank off or drill it when it is still attached to the bike?
You need to carefully drill the mushroom head off the bolt then it should just push out.
@deleted started
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You'll need to clamp it down as the bolts may spin when you drill them. Are you going to take the crank off or drill it when it is still attached to the bike?
You need to carefully drill the mushroom head off the bolt then it should just push out.