import SyclDevice directly in _dldevice_conversions

Full dpctl namespace is unnecessary, as only SyclDevice is used

dpctl/tensor/_dldevice_conversions.py

@@ -14,8 +14,7 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
-import dpctl
-
+from ._sycl_device import SyclDevice
 from ._usmarray import DLDeviceType
 
 
@@ -29,12 +28,12 @@ def dldevice_to_sycldevice(dl_dev: tuple):
         )
     if dl_dev[0] != DLDeviceType.kDLOneAPI:
         raise ValueError("dldevice type must be kDLOneAPI")
-    return dpctl.SyclDevice(str(dl_dev[1]))
+    return SyclDevice(str(dl_dev[1]))
 
 
-def sycldevice_to_dldevice(dev: dpctl.SyclDevice):
-    if not isinstance(dev, dpctl.SyclDevice):
+def sycldevice_to_dldevice(dev: SyclDevice):
+    if not isinstance(dev, SyclDevice):
         raise TypeError(
-            "dev is expected to be a dpctl.SyclDevice, got " f"{type(dev)}"
+            "dev is expected to be a SyclDevice, got " f"{type(dev)}"
         )
     return (DLDeviceType.kDLOneAPI, dev.get_device_id())