Why remove the drums
Drummers use drumless tracks to check their own part against the recording. Guitarists, bassists and singers do the opposite and use them to practise against the rest of the band without the original drummer on top. A producer might want the harmonic bed of a track without a busy rhythm competing with a new beat.
Drum removal is a separation problem rather than an effect. A filter cannot pull a snare out of a mix without taking a chunk of the guitars with it, so the page uses a neural source-separation model that estimates the drum kit as its own layer.