minor type update and unused import removal.

libervia/backend/plugins/plugin_misc_text_syntaxes.py

@@ -20,7 +20,6 @@
 from functools import partial
 from html import escape
 import re
-from typing import Set
 
 from twisted.internet import defer
 from twisted.internet.threads import deferToThread
@@ -379,7 +378,7 @@ class TextSyntaxes(object):
         @param styles_raw: CSS styles
         @return: cleaned styles
         """
-        styles: List[str] = styles_raw.split(";")
+        styles: list[str] = styles_raw.split(";")
         cleaned_styles = []
         for style in styles:
             try: