rm_work: The do_setscene task has not existed for years

Once, there were do_setscene tasks but this hasn't been the case for years,
drop the old code.

(From OE-Core rev: b13a691f1cfc0d68a0f94c343fa3a1b987dbe117)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/rm_work.bbclass

@@ -50,9 +50,6 @@ do_rm_work () {
         for j in ${SSTATETASKS} do_shared_workdir
         do
             case $i in
-            *do_setscene*)
-                break
-                ;;
             *sigdata*|*sigbasedata*)
                 i=dummy
                 break