[youtube] Remove vevo test

The video is no longer available and it seems that vevo video don't use encrypted signatures anymore.

youtube_dl/extractor/youtube.py

@@ -339,18 +339,6 @@ class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
                 u"description": u"test chars:  \"'/\\ä↭𝕐\n\nThis is a test video for youtube-dl.\n\nFor more information, contact phihag@phihag.de ."
             }
         },
-        {
-            u"url":  u"http://www.youtube.com/watch?v=1ltcDfZMA3U",
-            u"file":  u"1ltcDfZMA3U.mp4",
-            u"note": u"Test VEVO video (#897)",
-            u"info_dict": {
-                u"upload_date": u"20070518",
-                u"title": u"Maps - It Will Find You",
-                u"description": u"Music video by Maps performing It Will Find You.",
-                u"uploader": u"MuteUSA",
-                u"uploader_id": u"MuteUSA"
-            }
-        },
         {
             u"url":  u"http://www.youtube.com/watch?v=UxxajLWwzqY",
             u"file":  u"UxxajLWwzqY.mp4",