Revert "Input: i8042 - add ThinkPad S230u to i8042 nomux list"

This reverts commit 18931506. From Kevin
Locke:

"... nomux only appeared to fix the issue because the controller
continued working after warm reboots. After more thorough testing from
both warm and cold start, I now believe the entry should be added to
i8042_dmi_reset_table rather than i8042_dmi_nomux_table as i8042.reset=1
alone is sufficient to avoid the issue from both states while
i8042.nomux is not."

drivers/input/serio/i8042-x86ia64io.h

@@ -541,13 +541,6 @@ static const struct dmi_system_id __initconst i8042_dmi_nomux_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"),
 		},
 	},
-	{
-		/* Lenovo ThinkPad Twist S230u */
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "33474HU"),
-		},
-	},
 	{ }
 };