chore(google-cloud-dns): remove scanner pragma from README.rst

Author: chalmerlowe

packages/google-cloud-dns/README.rst

@@ -67,7 +67,6 @@ Python >= 3.10
 
 Unsupported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-.. version-scanner: ignore-next-line
 Python <= 3.9
 
 If you are using an `end-of-life`_