Hi all, in Fedora have two packages:
1. https://apps.fedoraproject.org/packages/rubygem-connection-pool
and
2. https://apps.fedoraproject.org/packages/rubygem-connection_pool How delete my file in Fedora:
https://apps.fedoraproject.org/packages/rubygem-connection-pool

Thanks and sorry for my mistake.
(user: ilgrad)