partitions/ldm: remove redundant pointer dgrp

Pointer dgrp is being assigned but is never used hence it is redundant
and can be removed.

Cleans up clang warning:
warning: variable 'dgrp' set but not used [-Wunused-but-set-variable]

Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

block/partitions/ldm.c

···
 {
 	char buf[64];
 	int r_objid, r_name, r_id1, r_id2, len;
-	struct vblk_dgrp *dgrp;
 
 	BUG_ON (!buffer || !vb);
 
···
 	len += VBLK_SIZE_DGR4;
 	if (len != get_unaligned_be32(buffer + 0x14))
 		return false;
-
-	dgrp = &vb->vblk.dgrp;
 
 	ldm_get_vstr (buffer + 0x18 + r_objid, buf, sizeof (buf));
 	return true;