WifiStateMachine: clean up dead code

Cleaned up the dead code from the original exponential back off
scan implementation.

Bug: 28750989
Bug: 28070598

Change-Id: I8abf82cdaa3530fb514794b4004c5d3f15950672
Tests: Wifi Unit Tests, manual test
3 files changed
tree: 3bde87ba37efcc6e4eda148fda4bec78ef98bc07
  1. service/