Is it worth parting out a set to sell without the minifigs?
Not having the minifigs certainly hurts the value of a set, but it may still be worth parting out the set depending on how valuable your time is to you.

If you haven't already done so, you can use the Price Guide feature on Bricklink to get a rough idea of what your set can sell for.

You can also browse the current listings for the set to get an idea of how much missing minifigs hurt the price. For that set, it looks like not having minifigs knocks off about 40% of the value of the set ($24 USD vs $42 USD).