Remove unused imports

Author: froggleston

ftui/screens/modal_screens.py

@@ -1,6 +1,6 @@
 import pandas as pd
 from textual.app import ComposeResult
-from textual.containers import Container, Horizontal, Vertical
+from textual.containers import Container
 from textual.screen import ModalScreen
 from textual.widgets import (
     DataTable,