Explain the problem.

Previously I used code.html -o code.md to convert compiled code blocks back into Markdown. This output quite a bit of unwanted code (classnames and such). Using code.html -t gfm-raw_html -o code.md is a lot better, but still leaves in the ``` sourceCode class. Is this by design or should it be removed?

Pandoc version?
Latest version 3.7.0.2.