Why was this cryptoasset delisted? When will you delist this cryptoasset; it has no volume!
The number of coins/tokens are constantly fluctuating.
If after a cryptoasset is listed on CoinMarketCap and some exchanges stop trading the cryptocurrency, its available markets will become inactive and its volume will turn to zero. Only then CoinMarketCap will deactivate the listings after a few days grace period (in case the cryptoasset's market was just down temporarily).
This is why CoinMarketCap has coins/tokens with little to no volume. These cryptoassets will automatically be delisted after the grace period.
As long as these cryptoassets have volume, it will remain listed on the site.