Was there a specifically mine clearing variant of the Goliath? Can't see it being substantial enough to endure even an anti-personnel mine, or tow anything heavy enough to burst anti-tank ones.
Dropping the demo charge from one, or several, and hoping for some clearance by ground blast/pressure might work but would be very wasteful, and as British experiments found, explosives, though a reasonably reliable way of clearing the Teller-mine, were not ideal... not to mention that pumped explosive systems like Conger proved absolutely lethal to the crews servicing them too:
There's some intriguing shots of various AFVs from Matilda to Sherman carrying bangalore torpedo launching rails for mine clearance, their effectiveness is perhaps demonstrated by their rarity in service
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Cheers,
Adam.