Input: elantech - remove module parameter force_elantech

This essentially reverts commit f81bc788.

With recent work on elantech driver, I believe we now have complete support
for all elantech touchpads. So remove this hack.
Signed-off-by: JJ Ding <jj_ding@emc.com.tw>
Reviewed-by: Éric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/mouse/elantech.c

@@ -28,10 +28,6 @@
 			printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__);	\
 	} while (0)
 
-static bool force_elantech;
-module_param_named(force_elantech, force_elantech, bool, 0644);
-MODULE_PARM_DESC(force_elantech, "Force the Elantech PS/2 protocol extension to be used, 1 = enabled, 0 = disabled (default).");
-
 /*
  * Send a Synaptics style sliced query command
  */
@@ -1164,14 +1160,10 @@ int elantech_detect(struct psmouse *psmouse, bool set_properties)
 		 param[0], param[1], param[2]);
 
 	if (!elantech_is_signature_valid(param)) {
-		if (!force_elantech) {
 		pr_debug("Probably not a real Elantech touchpad. Aborting.\n");
 		return -1;
 	}
 
-		pr_debug("Probably not a real Elantech touchpad. Enabling anyway due to force_elantech.\n");
-	}
-
 	if (set_properties) {
 		psmouse->vendor = "Elantech";
 		psmouse->name = "Touchpad";