iavf: remove unused debug function iavf_debug_d

There is no caller of function iavf_debug_d() in tree since
commit 75051ce4 ("iavf: Fix up debug print macro"),
so it can be removed.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/iavf/iavf_main.c

@@ -142,28 +142,6 @@ enum iavf_status iavf_free_virt_mem_d(struct iavf_hw *hw,
 	return 0;
 }
 
-/**
- * iavf_debug_d - OS dependent version of debug printing
- * @hw:  pointer to the HW structure
- * @mask: debug level mask
- * @fmt_str: printf-type format description
- **/
-void iavf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
-{
-	char buf[512];
-	va_list argptr;
-
-	if (!(mask & ((struct iavf_hw *)hw)->debug_mask))
-		return;
-
-	va_start(argptr, fmt_str);
-	vsnprintf(buf, sizeof(buf), fmt_str, argptr);
-	va_end(argptr);
-
-	/* the debug string is already formatted with a newline */
-	pr_info("%s", buf);
-}
-
 /**
  * iavf_schedule_reset - Set the flags and schedule a reset event
  * @adapter: board private structure