6fdfec5282
This commit removes support for CentOS 7
from the docs.
The change applies to version 5.4,so it
must be backported to branch-5.4.
Refs https://github.com/scylladb/scylla-enterprise/issues/3502
In addition, this commit removes the information
about Amazon Linux and Oracle Linux, unnecessarily added
without request, and there's no clarity over which versions
should be documented.
Closes scylladb/scylladb#16279
(cherry picked from commit af1405e517)
