Sony published that is going to drop support of the Youtube and Maps apps and also remove some of the functions of the [near] app.
All features of the [Maps] application and some features of the [near] application will be disabled with the PlayStation®Vita system software update planned on March, 2015.
Functionalities of the applications will be removed automatically once users update their PlayStation®Vita.
The disablement of features will not affect gameplay.
While the maps function was really lackluster, the Youtube app was heavily used for some people and was particularly useful to watch walkthroughs and such. fortunately you can access Youtube through the Browser.
The removal of some functions on the [near] app could render some trophies unobtainable in certain games, although I doubt they would remove the item share function but rather the map that appear when you look for nearby people.
Very unfortunate and alarming as this is the first solid sign of carelessness of Sony towards the Vita. I just hope this is just another case of expiring licenses and nothing more. I myself will be backing up the Youtube app to my laptop just to see if you can bypass his removal that way.