IF AN EXPERT SAYS IT CAN'T BE DONE GET ANOTHER EXPERT.
I`ve searched on google for some tutorials, but couldn't find anything updated, so I thought to make one.
Go to privacy settings
Scroll to the bottom of the page and search for Apps and Websitesand click on edit your settings.
You will get a list with all of your apps under Apps you use. In the end of the list you will find Remove link, by clicking the link you will be forward to a new page with you apps list:
If you want to remove one App or more just click the X sign in the right side of the app you want to remove.
Hope I helped,