use new sphinx modules
diff --git a/Doc/tools/sphinxext/pyspecific.py b/Doc/tools/sphinxext/pyspecific.py
index c3268e9..018f4ac 100644
--- a/Doc/tools/sphinxext/pyspecific.py
+++ b/Doc/tools/sphinxext/pyspecific.py
@@ -48,15 +48,9 @@
from docutils.io import StringOutput
from docutils.utils import new_document
-try:
- from sphinx.builders import Builder
-except ImportError:
- from sphinx.builder import Builder
+from sphinx.builders import Builder
+from sphinx.writers.text import TextWriter
-try:
- from sphinx.writers.text import TextWriter
-except ImportError:
- from sphinx.textwriter import TextWriter
class PydocTopicsBuilder(Builder):
name = 'pydoc-topics'