fix test

tests/test_core.py

@@ -1,21 +1,12 @@
-import pytest
+import pytest  # noqa
 from fastapi.testclient import TestClient
-from sqlmodel import Session
 
-from merchants.database import engine
 from merchants.FastapiApp import app
 
 # Create a test client
 client = TestClient(app)
 
 
-# Mock database session
-@pytest.fixture
-def mock_db():
-    with Session(engine) as session:
-        yield session
-
-
 # Test root endpoint
 def test_root():
     response = client.get("/")