MAINTAINERS: remove gensyscalls.sh from the linux-user section

The file has been removed by c52e40596834
("linux-user,loongarch: move to syscalltbl file").

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
1 file changed