Are you saying Linux, the kernel, has a dependency on Redis? That is not true.
Which mentioned a few instances of distros having dependencies:
https://lwn.net/ml/fedora-devel/CAEg-Je_GoiJN6kOj1_K5WqTvA6n...
https://lwn.net/ml/opensuse-factory/AB7886BD-E33E-4ACA-8F94-...