NEW YORK (Reuters) - Twitter Inc announced Thursday that it would discontinue the video-sharing mobile app Vine, as it moves to cut 9 percent of its workforce worldwide to keep costs down after beating Wall Street quarterly earnings expectations.<div><a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=ES505FZ-ync:g3w8saUBz1E:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?d=yIl2AUoC8zA" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=ES505FZ-ync:g3w8saUBz1E:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=ES505FZ-ync:g3w8saUBz1E:V_sGLiPBpWU" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=ES505FZ-ync:g3w8saUBz1E:-BTjWOF_DHI"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=ES505FZ-ync:g3w8saUBz1E:-BTjWOF_DHI" border="0" /></a></div><img src="http://feeds.feedburner.com/~r/reuters/technologyNews/~4/ES505FZ-ync" height="1" width="1" alt="" />