refactor: remove unused imports

tests/utils/asyncio/test_embed_shell.py

@@ -15,7 +15,6 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import asyncio
 
 # from gns3server.utils.asyncio.embed_shell import EmbedShell
 

tests/utils/test_images.py

@@ -17,7 +17,6 @@
 import os
 import sys
 import threading
-from unittest.mock import patch
 
 import pytest