Revert "serial: 8250: add driver for NI UARTs"

This reverts commit 40ee402.

Signed-off-by: Chaitanya Vadrevu <chaitanya.vadrevu@emerson.com>

Author: chaitu236

MAINTAINERS

@@ -14672,13 +14672,6 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next
 F:	drivers/mtd/nand/
 F:	include/linux/mtd/*nand*.h
 
-NATIONAL INSTRUMENTS SERIAL DRIVER
-M:	Brenda Streiff <brenda.streiff@ni.com>
-L:	linux-serial@vger.kernel.org
-S:	Maintained
-F:	Documentation/devicetree/bindings/serial/ni,ni16550.yaml
-F:	drivers/tty/serial/8250/8250_ni.c
-
 NATIVE INSTRUMENTS USB SOUND INTERFACE DRIVER
 M:	Daniel Mack <zonque@gmail.com>
 L:	alsa-devel@alsa-project.org (moderated for non-subscribers)