i40e: i40e_fcoe.c: Remove unused function

Remove the function i40e_rx_is_fip() that is not used anywhere.

This was partially found by using a static code analysis program
called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_fcoe.c

@@ -38,15 +38,6 @@
 #include "i40e.h"
 #include "i40e_fcoe.h"
 
-/**
- * i40e_rx_is_fip - returns true if the rx packet type is FIP
- * @ptype: the packet type field from rx descriptor write-back
- **/
-static inline bool i40e_rx_is_fip(u16 ptype)
-{
-	return ptype == I40E_RX_PTYPE_L2_FIP_PAY2;
-}
-
 /**
  * i40e_rx_is_fcoe - returns true if the rx packet type is FCoE
  * @ptype: the packet type field from rx descriptor write-back