remove: remove stats/strided/distances/dchebychev

This commit removes `@stdlib/stats/strided/distances/dchebychev` in
favor of `@stdlib/stats/strided/distances/dchebyshev`.

BREAKING CHANGE: remove `stats/strided/distances/dchebychev`

To migrate, users should update their require/import paths to use
`@stdlib/stats/strided/distances/dchebyshev` which provides the same API and implementation.

Author: nakul-krishnakumar