Skunks are omnivorous so practically speaking you cannot remove there food from there habitat because they can eat just about anything from insects to animals and plants.But to force them to leave your premise you can take some steps like:-
Step 1: Do not feed skunks
Step 2: Prevent access to denning sites
Step 3: Secure chicken and ducks in a coop at night (if you have)
Step 4: Protect your pet
Step 5: Prevent damage to lawns
Source:http://www.whatdoskunkseat.com/how-to-get-rid-of-skunks/