Here is a quote from the provided link:
As promised, undistributed tokens will be burnt to reduce the market cap and ensure that everyone who took part in the airdrop is rewarded for their ongoing loyalty and belief in Rebellious. From this date we can start putting our full focus on development.
No, this token burn should probably have zero impact on the coin's price, they are doing it in order to keep the team's word to burn unsold tokens. Some potential tokenholders can take it as an important move saying something like " the team is great bla bla bla" but nothing more. Those tokens were undistributed and never got to the market. It could only have impact on the price if someone buy tokens from the market and only then destroy it.
