Remove commented-out pandas imports

Author: c-simpson

src/server/api/file_uploader.py

@@ -1,4 +1,3 @@
-# import pandas as pd
 from config import engine
 from donations_importer import validate_import_sfd
 from flask import current_app

src/server/models.py

@@ -2,7 +2,6 @@
 import re
 from itertools import combinations
 
-# import pandas as pd
 import sqlalchemy as sa
 from sqlalchemy import (
     Boolean,