initscripts: removal of lvmetad initscript

initscripts: removal of lvmetad initscript

- With the last update of lvm2 lvmetad was removed from lvm2. I did not recognise that
   lvmetad had been setup as an automatic initscript, so it no longer works as the
   binary is no longer provided.
- This patch removes the lvmetad initscript, the reference to lvmetad in the initscript
   lfs file and the lvmetad initscript entries in the rootfile for each architecture.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>