avahi-ui: drop rmdir localstatedir in bb recipe

There is a "rmdir --ignore-fail-on-non-empty ${D}${localstatedir}" in
avahi.inc, so drop the one in avahi-ui_0.6.31.bb, otherwise do_install
error:
rmdir: failed to remove `/path/to/image/var': No such file or directory

(From OE-Core rev: 8111ab4cdadb4b7523652c593c48da74d9d0f8ef)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/avahi/avahi-ui_0.6.31.bb

@@ -64,6 +64,5 @@ do_install_append () {
 	rm ${D}${mandir}/man1/a*
 	rm ${D}${mandir}/man5 -rf
 	rm ${D}${mandir}/man8 -rf
-	rmdir ${D}${localstatedir}
 }