ceph: revert new node is not provisioned when useallnodes is true

This reverts commit a6ee5657ae.
The operator reconcile of the cephcluster was staying in an endless
loop in clusters that did not have OSDs configured on all nodes.
Now we revert this change for the patch release and will follow
up with a more complete fix in https://github.com/rook/rook/pull/6813.

Signed-off-by: Travis Nielsen <tnielsen@redhat.com>

pkg/daemon/ceph/client/crush.go

@@ -22,12 +22,10 @@ import (
 	"io/ioutil"
 	"strconv"
 	"strings"
-	"syscall"
 
 	"github.com/pkg/errors"
 	cephv1 "github.com/rook/rook/pkg/apis/ceph.rook.io/v1"
 	"github.com/rook/rook/pkg/clusterd"
-	"github.com/rook/rook/pkg/util/exec"
 )
 
 const (
@@ -204,10 +202,6 @@ func GetOSDOnHost(context *clusterd.Context, clusterInfo *ClusterInfo, node stri
 	args := []string{"osd", "crush", "ls", node}
 	buf, err := NewCephCommand(context, clusterInfo, args).Run()
 	if err != nil {
-		// ENOENT as error means that node is not (yet) part of the ceph cluster
-		if code, ok := exec.ExitStatus(err); ok && code == int(syscall.ENOENT) {
-			return "", nil
-		}
 		return "", errors.Wrapf(err, "failed to get osd list on host. %s", string(buf))
 	}