ACPI / video: Revert native brightness quirk for ThinkPad T530

Seems it helps some users, but causes issues for other users:
https://bugzilla.redhat.com/show_bug.cgi?id=1089545

So lets drop it for now until we've figured out a better fix.

Fixes: 43d9490244 (ACPI / video: Add use_native_backlight quirks for more systems)
References: https://bugzilla.redhat.com/show_bug.cgi?id=1089545
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/video.c

@@ -471,14 +471,6 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
 		DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X230"),
 		},
 	},
-	{
-	 .callback = video_set_use_native_backlight,
-	 .ident = "ThinkPad T530",
-	 .matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
-		DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T530"),
-		},
-	},
 	{
 	 .callback = video_set_use_native_backlight,
 	.ident = "ThinkPad X1 Carbon",