Update utils/pdf_export.py

utils/pdf_export.py

@@ -403,8 +403,6 @@ def export_research_dashboard_to_pdf(stats, calculated_metrics, advanced_metrics
     from reportlab.lib import colors
     from reportlab.lib.units import inch
     from datetime import datetime
-    import matplotlib.pyplot as plt
-    import seaborn as sns
     import pandas as pd
     import numpy as np
     from io import BytesIO