Remove unused imports after logging integration.

Author: hreikin

tkintermd/frame.py

@@ -9,8 +9,6 @@
 from tkinterweb import HtmlFrame, Notebook
 from tkinterweb.utilities import ScrolledTextBox
 
-from sys import stderr
-from traceback import print_exc
 from markdown import Markdown
 from pygments import lex
 from pygments.lexers.markup import MarkdownLexer