wifi: iwlwifi: remove unused function prototype

Saw this while going through the code, this function
hasn't existed for a while now; remove it.

Link: https://msgid.link/20240131220039.6fdb8cbf4814.I6c46065b836cafd93df676dd88c99a626a25bf46@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/fw/dbg.h

@@ -306,8 +306,6 @@ static inline void iwl_fw_error_collect(struct iwl_fw_runtime *fwrt, bool sync)
 	_iwl_dbg_tlv_time_point(fwrt, tp_id, NULL, sync);
 }
 
-void iwl_fw_error_print_fseq_regs(struct iwl_fw_runtime *fwrt);
-
 static inline void iwl_fwrt_update_fw_versions(struct iwl_fw_runtime *fwrt,
 					       struct iwl_lmac_alive *lmac,
 					       struct iwl_umac_alive *umac)