Update us.m3u

Removed dead link to CNBC channel (resolve #1296)

channels/us.m3u

@@ -271,8 +271,6 @@ https://nimble.dashmedia.tv/onestudio/classictv/playlist.m3u8
 https://cmctv.ios.internapcdn.net/cmctv_vitalstream_com/live_1/CMC-TV/playlist.m3u8
 #EXTINF:-1 tvg-id="" tvg-name="" tvg-language="English" tvg-logo="https://www.pngfind.com/pngs/m/258-2582037_cmc-usa-graphic-design-hd-png-download.png" group-title="",CMC-USA
 https://cmctv.ios.internapcdn.net/cmctv_vitalstream_com/live_1/CMCU-92/playlist.m3u8
-#EXTINF:-1 tvg-id="" tvg-name="" tvg-language="English" tvg-logo="https://i.imgur.com/53EgUZN.png" group-title="News",CNBC
-https://d3sjmtxha86r3t.cloudfront.net/nbc/smil:cnbc.smil/master.m3u8
 #EXTINF:-1 tvg-id="" tvg-name="" tvg-language="Arabic" tvg-logo="https://i.imgur.com/a6QmjRT.png" group-title="Business",CNBC Arabiya
 http://livecdnh2.tvanywhere.ae/hls/cnbc_ar/index.m3u8
 #EXTINF:-1 tvg-id="" tvg-name="" tvg-language="Arabic" tvg-logo="https://i.imgur.com/a6QmjRT.png" group-title="Business",CNBC Arabiya