ceph-volume: remove duplicate code

This check is already performed in `arg_validators.py`.
By the way, this check is only valid when the user passes a VG/LV with
the `<vg>/<lv>` format.

Signed-off-by: Guillaume Abrioux <[email protected]>

Author: guits

src/ceph-volume/ceph_volume/objectstore/lvmbluestore.py

@@ -114,18 +114,6 @@ def safe_prepare(self,
         if args is not None:
             self.args = args
 
-        try:
-            vgname, lvname = self.args.data.split('/')
-            lv = api.get_single_lv(filters={'lv_name': lvname,
-                                            'vg_name': vgname})
-        except ValueError:
-            lv = None
-
-        if lv is not None:
-            if api.is_ceph_device(lv):
-                logger.info("device {} is already used".format(self.args.data))
-                raise RuntimeError("skipping {}, it is already prepared".format(
-                    self.args.data))
         try:
             self.prepare()
         except Exception: