Resolve compilation errors for unused functions

TP:
Resolve compilation errors for unused functions ts_mmi_kobject_get_path.

Change-Id: I22b213db2304f4c3c73867ad9625f20715a4a528
Reviewed-on: https://gerrit.mot.com/2077104
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Jichao Zou <zoujc@motorola.com>
Submit-Approved: Jira Key

drivers/input/touchscreen/touchscreen_mmi/touchscreen_mmi_class.c

@@ -184,11 +184,8 @@ static ssize_t path_show(struct device *dev,
 		return (ssize_t)0;
 	}
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 10, 0))
 	path = ts_mmi_kobject_get_path(&DEV_MMI->kobj, GFP_KERNEL);
-#else
-	path = kobject_get_path(&DEV_MMI->kobj, GFP_KERNEL);
-#endif
+
 	blen = scnprintf(buf, PAGE_SIZE, "%s", path ? path : "na");
 	kfree(path);
 	return blen;