qcacld-3.0: Remove hdd_sysfs_*_adapter_root_obj() stubs

The functions hdd_sysfs_create_adapter_root_obj() and
hdd_sysfs_destroy_adapter_root_obj() were removed in the
following patch, replaced with mode-specific APIs:
  qcacld-3.0: Add a sysfs replacement for reassoc
  Change-Id Ib4f3582bb8c164dd4f3ab739367520b9aeb0f5b9

However the stubs for when WLAN_SYSFS is not defined were
not removed, so remove them now.

Change-Id: I8c82b410d2891cbf8f3d619fcb6c1c60a5a0a9ca
CRs-Fixed: 3425058

core/hdd/inc/wlan_hdd_sysfs.h

@@ -116,16 +116,6 @@ static inline void hdd_destroy_sysfs_files(void)
 {
 }
 
-static inline
-void hdd_sysfs_create_adapter_root_obj(struct hdd_adapter *adapter)
-{
-}
-
-static inline
-void hdd_sysfs_destroy_adapter_root_obj(struct hdd_adapter *adapter)
-{
-}
-
 static inline void hdd_create_adapter_sysfs_files(struct hdd_adapter *adapter)
 {
 }