bash-completion: remove rfkill file that util-linux provides

Remove the rfkill bash completion file that util-linux provides
to avoid conflicts.

(From OE-Core rev: db5f9b8b5f51e8c0b6fc99dfdbac8b11f272d602)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/bash-completion/bash-completion_2.7.bb

@@ -25,7 +25,7 @@ do_install_append() {
 
 	# Delete files already provided by util-linux
 	local i
-	for i in mount umount; do
+	for i in mount umount rfkill; do
 		rm ${D}${datadir}/${BPN}/completions/$i
 	done
 }