chore: removed unused import

Author: sai-sankalp-reddy

src/hyperpod_cli/service/list_training_jobs.py

@@ -10,7 +10,6 @@
 # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
 # ANY KIND, either express or implied. See the License for the specific
 # language governing permissions and limitations under the License.
-import copy
 from typing import List, Optional
 
 import json