net-p2p/monero-cli: fix build on non-x86

Checking battery status uses x86-only headers and functions. Remove this functionality to get it to build on other architectures.

PR: 241230
Approved by: linimon (mentor), vd (maintainer)
Pull Request: https://github.com/monero-project/monero/pull/5984
Differential Revision: https://reviews.freebsd.org/D22027