I found the solution.... go to the facebook app, click on the left button in the left bottom corner of your phone and a bar will come up with ''settings'' ''log out'' ''about'' and ''report bug'' listed.....click on 'settings'', scoll down to the bottom and it says ''sync contacts''..press it...and 3 options appear..''sync all'' ''sync with existing contacts'' and ''don't sync''...press '''don't sync'' and it will remove all the facebook synced contacts and then press done and you have removed your facebook contacts from your phone.