Description of change
This is a mechanical patch that draws some elements from #11683 into a base type in networkingcommon.
This new type will form the basis of a forthcoming model operation that updates link-layer data sourced from machine agents. In turn, this will allow removal of a great deal of convoluted logic from state, currently used for the same purpose.
The removal of unused interface methods and corresponding shrinkage in generated mock code makes this patch a net removal of code.
QA steps
Changes are mechanical only. Unit tests for the instancepoller API facade remain green.
Documentation changes
None.
Bug reference
N/A
该提问来源于开源项目：juju/juju
