[NBCSports/Yahoo] Comment out some MD5 checksums

They seems to change constantly

youtube_dl/extractor/nbc.py

@@ -55,7 +55,6 @@ class NBCSportsVPlayerIE(InfoExtractor):
 
     _TESTS = [{
         'url': 'https://vplayer.nbcsports.com/p/BxmELC/nbcsports_share/select/9CsDKds0kvHI',
-        'md5': 'ceae8dced5c14a1c1ffcb7a32194cca5',
         'info_dict': {
             'id': '9CsDKds0kvHI',
             'ext': 'flv',
@@ -88,7 +87,6 @@ class NBCSportsIE(InfoExtractor):
 
     _TEST = {
         'url': 'http://www.nbcsports.com//college-basketball/ncaab/tom-izzo-michigan-st-has-so-much-respect-duke',
-        'md5': 'ba6c93f96b67bf05344f78bd523dac0f',
         'info_dict': {
             'id': 'PHJSaFWbrTY9',
             'ext': 'flv',

youtube_dl/extractor/yahoo.py

@@ -134,7 +134,6 @@ class YahooIE(InfoExtractor):
         }, {
             'note': 'NBC Sports embeds',
             'url': 'http://sports.yahoo.com/blogs/ncaab-the-dagger/tyler-kalinoski-s-buzzer-beater-caps-davidson-s-comeback-win-185609842.html?guid=nbc_cbk_davidsonbuzzerbeater_150313',
-            'md5': 'ceae8dced5c14a1c1ffcb7a32194cca5',
             'info_dict': {
                 'id': '9CsDKds0kvHI',
                 'ext': 'flv',