staging: wlan-ng: Remove unused function declarations

Several functions are declared but are not implemented or used in any
part of the code. Remove such unimplemented function declarations.
Signed-off-by: Deepak R Varma <drv@mailo.com>
Link: https://lore.kernel.org/r/09e2af8d702e33c15ed9f655b0a1190b4e8bec86.1667308828.git.drv@mailo.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wlan-ng/p80211mgmt.h

@@ -449,26 +449,4 @@ struct wlan_fr_deauthen {
 	/*-- info elements ----------*/
 
 };
-
-void wlan_mgmt_encode_beacon(struct wlan_fr_beacon *f);
-void wlan_mgmt_decode_beacon(struct wlan_fr_beacon *f);
-void wlan_mgmt_encode_disassoc(struct wlan_fr_disassoc *f);
-void wlan_mgmt_decode_disassoc(struct wlan_fr_disassoc *f);
-void wlan_mgmt_encode_assocreq(struct wlan_fr_assocreq *f);
-void wlan_mgmt_decode_assocreq(struct wlan_fr_assocreq *f);
-void wlan_mgmt_encode_assocresp(struct wlan_fr_assocresp *f);
-void wlan_mgmt_decode_assocresp(struct wlan_fr_assocresp *f);
-void wlan_mgmt_encode_reassocreq(struct wlan_fr_reassocreq *f);
-void wlan_mgmt_decode_reassocreq(struct wlan_fr_reassocreq *f);
-void wlan_mgmt_encode_reassocresp(struct wlan_fr_reassocresp *f);
-void wlan_mgmt_decode_reassocresp(struct wlan_fr_reassocresp *f);
-void wlan_mgmt_encode_probereq(struct wlan_fr_probereq *f);
-void wlan_mgmt_decode_probereq(struct wlan_fr_probereq *f);
-void wlan_mgmt_encode_proberesp(struct wlan_fr_proberesp *f);
-void wlan_mgmt_decode_proberesp(struct wlan_fr_proberesp *f);
-void wlan_mgmt_encode_authen(struct wlan_fr_authen *f);
-void wlan_mgmt_decode_authen(struct wlan_fr_authen *f);
-void wlan_mgmt_encode_deauthen(struct wlan_fr_deauthen *f);
-void wlan_mgmt_decode_deauthen(struct wlan_fr_deauthen *f);
-
 #endif /* _P80211MGMT_H */