wificond: Remove offload HAL client code

This is unused currently & there are no concrete plans to use it
in the future.

Bug: 130080335
Test: Device boots up & connects to networks.
Test: Will send for regression tests
Change-Id: Ibe0b31294a63c8e051565a6f3a423d8eba228ca0
Merged-In: Ibe0b31294a63c8e051565a6f3a423d8eba228ca0
(cherry picked from commit 2c4b65e507cac091b82d33555663e78c47130b4f)
43 files changed