remove unused imports

frontend/views/main_view.py

@@ -2,7 +2,7 @@ import io
 import tkinter as tk
 from tkinter import Frame, Canvas, ttk, PhotoImage
 
-from PIL import Image, ImageChops
+from PIL import ImageChops
 
 from ..config import DISPLAY_TYPES
 from . import NumberView, CircleView, TimerView

frontend/views/timer.py

@@ -1,8 +1,7 @@
 import tkinter as tk
 from tkinter import ttk
-from PIL import Image, ImageDraw, ImageChops
+from PIL import ImageDraw
 import time
-import math
 
 from .base import View