nimble/phy: Remove unused code
nimble/phy: Remove unused code

This code does not seem to do anything useful.

X-Original-Commit: b9daffc2d277b32791c5af90510c1d9515e27c71

apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble