Not realistic. I've seen multiple companies build their success on social media (don't forget Pinterest) after stagnating through SEO and traditional advertising, so to say "quit it" is not only killing millions of dollars of opportunity but completely unnecessary if your point is that you as a worker waste too much of your work day on it.
Do like I do and turn your phone or tablet notifications for these apps off and check them later in your free time. If you really can't handle being personally responsible in your job, then sure, quit social media, but otherwise grow up and keep your brain on.
If an investor needs 70+ hours a week of work from one person to consider them determined, I'd question their intelligence, commitment, or financial security, because hiring some help seems like the wiser decision.
Maybe your next career move should be to make YouTube videos about the days in your life as a developer.