RTC: Remove Kconfig symbol for UIE emulation

The effect of changing the value of this symbol is gone since 042620a0
(RTC: Remove UIE emulation).

Remove symbol too.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>
LKML-Reference: <1295625406-15340-1-git-send-email-u.kleine-koenig@pengutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

drivers/rtc/Kconfig

@@ -97,18 +97,6 @@ config RTC_INTF_DEV
 
 	  If unsure, say Y.
 
-config RTC_INTF_DEV_UIE_EMUL
-	bool "RTC UIE emulation on dev interface"
-	depends on RTC_INTF_DEV
-	help
-	  Provides an emulation for RTC_UIE if the underlying rtc chip
-	  driver does not expose RTC_UIE ioctls. Those requests generate
-	  once-per-second update interrupts, used for synchronization.
-
-	  The emulation code will read the time from the hardware
-	  clock several times per second, please enable this option
-	  only if you know that you really need it.
-
 config RTC_DRV_TEST
 	tristate "Test driver/device"
 	help