"""
Test cases for visualization functions.

Note: All visualization functions have been removed as they were unused.
This file exists to maintain test structure.
"""

import unittest

class TestVisualization(unittest.TestCase):
    """Test cases for visualization functions."""

    def test_placeholder(self):
        """Placeholder test since all visualization functions were removed."""
        self.assertTrue(True, "All visualization functions have been removed as they were unused")

if __name__ == '__main__':
    unittest.main()