lisa.energy_model: Remove deprecated sysfs energy model loader
lisa.energy_model: Remove deprecated sysfs energy model loader

This loader was only needed during development of mainline Energy Model
framework, and has been superseded by the debugfs loader in the now mainline
Energy Model code.

ARM-software/lisa,ARM-software/lisa,ARM-software/lisa,credp/lisa,credp/lisa,credp/lisa,ARM-software/lisa,credp/lisa