staging: wlan-ng: Remove unused struct wlan_ie_ibss_parms references

Pointer reference to struct wlan_ie_ibss_parms is added as a member
variable to 2 structures; However, these references are never used.
Remove such unused struct references. The cleanup also renders the
struct useless; so remove it as well.
Issue identified as part of coccicheck based code analysis.
Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Suggested-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Deepak R Varma <drv@mailo.com>
Link: https://lore.kernel.org/r/e53084cdd3ca3ffea6a32393f6f28c7b7650d1a4.1667308828.git.drv@mailo.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wlan-ng/p80211mgmt.h

@@ -253,13 +253,6 @@ struct wlan_ie_cf_parms {
 	u16 cfp_durremaining;
 } __packed;
 
-/*-- IBSS Parameter Set ---------------------------*/
-struct wlan_ie_ibss_parms {
-	u8 eid;
-	u8 len;
-	u16 atim_win;
-} __packed;
-
 /*-- Challenge Text  ------------------------------*/
 struct wlan_ie_challenge {
 	u8 eid;
@@ -298,7 +291,6 @@ struct wlan_fr_beacon {
 	struct wlan_ie_fh_parms *fh_parms;
 	struct wlan_ie_ds_parms *ds_parms;
 	struct wlan_ie_cf_parms *cf_parms;
-	struct wlan_ie_ibss_parms *ibss_parms;
 };
 
 /*-- IBSS ATIM ------------------------------------*/
@@ -424,7 +416,6 @@ struct wlan_fr_proberesp {
 	struct wlan_ie_fh_parms *fh_parms;
 	struct wlan_ie_ds_parms *ds_parms;
 	struct wlan_ie_cf_parms *cf_parms;
-	struct wlan_ie_ibss_parms *ibss_parms;
 };
 
 /*-- Authentication -------------------------------*/