HID: intel-ish-hid: Remove unused ishtp_dev_state_str

ishtp_dev_state_str() was added in 2016 by
commit 3703f53b99 ("HID: intel_ish-hid: ISH Transport layer")
but has never been used.

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

drivers/hid/intel-ish-hid/ishtp/init.c

@@ -14,36 +14,6 @@
 #include "client.h"
 #include "loader.h"
 
-/**
- * ishtp_dev_state_str() -Convert to string format
- * @state: state to convert
- *
- * Convert state to string for prints
- *
- * Return: character pointer to converted string
- */
-const char *ishtp_dev_state_str(int state)
-{
-	switch (state) {
-	case ISHTP_DEV_INITIALIZING:
-		return	"INITIALIZING";
-	case ISHTP_DEV_INIT_CLIENTS:
-		return	"INIT_CLIENTS";
-	case ISHTP_DEV_ENABLED:
-		return	"ENABLED";
-	case ISHTP_DEV_RESETTING:
-		return	"RESETTING";
-	case ISHTP_DEV_DISABLED:
-		return	"DISABLED";
-	case ISHTP_DEV_POWER_DOWN:
-		return	"POWER_DOWN";
-	case ISHTP_DEV_POWER_UP:
-		return	"POWER_UP";
-	default:
-		return "unknown";
-	}
-}
-
 /**
  * ishtp_device_init() - ishtp device init
  * @dev: ISHTP device instance

drivers/hid/intel-ish-hid/ishtp/ishtp-dev.h

@@ -57,7 +57,6 @@ enum ishtp_dev_state {
 	ISHTP_DEV_POWER_DOWN,
 	ISHTP_DEV_POWER_UP
 };
-const char *ishtp_dev_state_str(int state);
 
 struct ishtp_cl;