s390/dasd: remove unnecessary null test before debugfs_remove

This fixes checkpatch warning:
"WARNING: debugfs_remove(NULL) is safe this check is probably not required"
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/block/dasd.c

@@ -283,7 +283,6 @@ static int dasd_state_basic_to_known(struct dasd_device *device)
 
 	if (device->block) {
 		dasd_profile_exit(&device->block->profile);
-		if (device->block->debugfs_dentry)
 		debugfs_remove(device->block->debugfs_dentry);
 		dasd_gendisk_free(device->block);
 		dasd_block_clear_timer(device->block);
@@ -293,9 +292,7 @@ static int dasd_state_basic_to_known(struct dasd_device *device)
 		return rc;
 	dasd_device_clear_timer(device);
 	dasd_profile_exit(&device->profile);
-	if (device->debugfs_dentry)
 	debugfs_remove(device->debugfs_dentry);
-
 	DBF_DEV_EVENT(DBF_EMERG, device, "%p debug area deleted", device);
 	if (device->debug_area != NULL) {
 		debug_unregister(device->debug_area);
@@ -1111,22 +1108,16 @@ static void dasd_profile_init(struct dasd_profile *profile,
 static void dasd_profile_exit(struct dasd_profile *profile)
 {
 	dasd_profile_off(profile);
-	if (profile->dentry) {
 	debugfs_remove(profile->dentry);
 	profile->dentry = NULL;
-	}
 }
 
 static void dasd_statistics_removeroot(void)
 {
 	dasd_global_profile_level = DASD_PROFILE_OFF;
-	if (dasd_global_profile_dentry) {
 	debugfs_remove(dasd_global_profile_dentry);
 	dasd_global_profile_dentry = NULL;
-	}
-	if (dasd_debugfs_global_entry)
 	debugfs_remove(dasd_debugfs_global_entry);
-	if (dasd_debugfs_root_entry)
 	debugfs_remove(dasd_debugfs_root_entry);
 }