iwlwifi: fix warning iwl-trans.h is included more than once

Remove duplicate inclusion of iwl-trans.h.

This issue was found by includecheck.
Signed-off-by: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-devtrace.h

@@ -75,7 +75,6 @@ static inline size_t iwl_rx_trace_len(const struct iwl_trans *trans,
 
 #include <linux/tracepoint.h>
 #include <linux/device.h>
-#include "iwl-trans.h"
 
 
 #if !defined(CONFIG_IWLWIFI_DEVICE_TRACING) || defined(__CHECKER__)