qcacld-3.0: Remove hdd_wlan_set_ht2040_mode()

Function hdd_wlan_set_ht2040_mode() is obsolete, so remove it.

Change-Id: Ie5fef47eda8eb92442bb01f87c6e09d7d0c02b72
CRs-Fixed: 2371199
2 files changed