epub converter: small fix

src/html_epub_preprocessor.py

@@ -58,6 +58,8 @@ def update_src_links_in_images(body_tag: Tag,
             del img.attrs['width']
         if img.attrs.get('height'):
             del img.attrs['height']
+        if img.attrs.get('style'):
+            del img.attrs['style']
 
     return path2aws_path
 
@@ -233,16 +235,6 @@ def preprocess_footnotes(source_html_tag: Tag, href2soup_html: dict = None, note
 
         return tags
 
-    def get_footnote_tags2str(t):
-        unicode_string = ''
-        for child in t.children:
-            if type(child) is NavigableString:
-                unicode_string += str(child)
-            else:
-                unicode_string += child.decode_contents()
-
-        return unicode_string.strip()
-
     for i, noteref_tag in enumerate(noterefs_tags):
         href = noteref_tag.attrs['href']
         file, element_id = parse_a_tag_href(href)