Revert "storage: Validate the device formats at logical startup"

The check is pointless since LVM is capable to detect it's own members
and the check is flawed as it would fail if neither libblkid nor parted
is installed.

We don't really need to babysit LVM in this way.

This reverts commit cb38b6cbc7.

src/storage/storage_backend_logical.c

@@ -743,19 +743,6 @@ static int
 virStorageBackendLogicalStartPool(virConnectPtr conn ATTRIBUTE_UNUSED,
                                   virStoragePoolObjPtr pool)
 {
-    size_t i;
-
-    /* Let's make sure the pool's devices are properly formatted */
-    for (i = 0; i < pool->def->source.ndevice; i++) {
-        const char *path = pool->def->source.devices[i].path;
-
-        /* The blkid FS and Part probing code doesn't know "lvm2" (this
-         * pool's only format type), but it does know "LVM2_member", so
-         * we'll pass that here */
-        if (!virStorageBackendDeviceIsEmpty(path, "LVM2_member", false))
-            return -1;
-    }
-
     /* Let's make sure that the pool's name matches the pvs output and
      * that the pool's source devices match the pvs output.
      */