Korean GP, which was a surprise addition to the 2015 F1 schedule during the World Motorsport Council meeting has now been removed. But the important part of the story is that the updated calendar still says '21 competitions'.
Take a look HERE
2015 FIA Formula One World Championship calendar is confirmed as follows:
15/03 Australia
29/03 Malaysia
12/04 China
19/04 Bahrain
10/05 Spain
24/05 Monaco
07/06 Canada
21/06 Austria
05/07 Britain
19/07 Germany
26/07 Hungary
23/08 Belgium
06/09 Italy
20/09 Singapore
27/09 Japan
11/10 Russia
25/10 USA
01/11 Mexico
15/11 Brazil
29/11 Abu Dhabi