Remove the legacy ethernet config resource check.

The legacy ethernet config resource check isn't required any more
when the legacy resource cleanup in outside callers finishes, just
read the resource config from Connectivity module, but the value
still can be overlaid with pre-built RRO.

Bug: 214348333
Test: atest FrameworksNetTests
Change-Id: I86f6229343f9d48f0bd822e8086bdc880b81135f
2 files changed