Fix EndpointHandler class name and remove PIL dependencies

handler.py

@@ -3,15 +3,10 @@ import sys
 import json
 import torch
 import numpy as np
-from PIL import Image, ImageDraw
-import io
-import base64
 from typing import Dict, Any, List
-import tempfile
-import xml.etree.ElementTree as ET
 import math
 
-class DiffSketcherHandler:
+class EndpointHandler:
     def __init__(self, path=""):
         self.device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
         
@@ -288,4 +283,4 @@ class DiffSketcherHandler:
             paths.append(f'<line x1="{x1}" y1="{y1}" x2="{x2}" y2="{y2}" stroke="{color}" stroke-width="{stroke_width}" opacity="{opacity}"/>')
 
 # Create handler instance
-handler = DiffSketcherHandler()
+handler = EndpointHandler()