staging: keucr: remove driver

The driver hasn't been fully cleaned up and it doesn't look like anyone
is working on it anymore (including the original author). So remove the
driver and all references to it. If someone wants to finish cleaning
the driver up and moving it out of staging, this commit can be reverted.

Signed-off-by: Kristina Martšenko <kristina.martsenko@gmail.com>
Cc: Cho, Yu-Chen <acho@novell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/storage/ene_ub6250.c b/drivers/usb/storage/ene_ub6250.c
index ef6efb5..56f782b 100644
--- a/drivers/usb/storage/ene_ub6250.c
+++ b/drivers/usb/storage/ene_ub6250.c
@@ -2344,8 +2344,8 @@
 	}
 
 	if (!(misc_reg03 & 0x01)) {
-		pr_info("ums_eneub6250: The driver only supports SD/MS card. "
-			"To use SM card, please build driver/staging/keucr\n");
+		pr_info("ums_eneub6250: This driver only supports SD/MS cards. "
+			"It does not support SM cards.\n");
 	}
 
 	return result;