If Facebook's built in interface doesn't work to get rid of them, you can hide the links to the Smart Lists from the left column of your newsfeed using Custom CSS code, as outlined below
To use Custom CSS, you first need to install a browser add-on such as FB Purity ( http://fbpurity.com ), that lets you add your own CSS to alter the layout of Facebook's pages.
1) Click the link to the "Smart" list that you want to hide and look at the number that shows in the URL in the browser's address bar (its the number after /lists/) Copy that number
2) Replace the XXXXX in the code below with the number you copied, and paste it into FBP's Custom CSS box, then click "Save & Close":
/* Hide smart list in left column */
#listsNav div[data-itemid="XXXXX"] {display:none}
3) After clicking the Save button the page will refresh, and the smart list you chose to hide should be gone. Add a line of code as above for each smart list you want to hide, remember you need to find the list ID for each list and replace the XXXXX for each one.