Update finemapping.py

remove codes of scikit-image

hyperlpr/finemapping.py

@@ -2,8 +2,7 @@
 import cv2
 import numpy as np
 
-from skimage.filters import (threshold_otsu, threshold_niblack,
-                             threshold_sauvola)
+
 import niblack_thresholding as nt
 
 import deskew
@@ -128,4 +127,4 @@ def findContoursAndDrawBoundingBox2(image_rgb):
     image,M= deskew.fastDeskew(image)
 
 
-    return image
+    return image