remove unused imports

bingo.py

@@ -1,10 +1,9 @@
 #!/usr/bin/env python3
 
 from textual.app import App, ComposeResult
-from textual.widgets import Header, Footer, Input, Label, Static, Button
+from textual.widgets import Header, Input, Static, Button
 from textual.widget import Widget
 from textual.message import Message
-from textual.color import Color
 from textual.containers import Horizontal
 from textual.validation import Number
 from textual.reactive import reactive