Revert "langref: add section numbers"

This reverts commit 3542dbf0ea5bc1ddb1c5e1c856745dc07e6c0a18.

I don't like them
a054c01f5cAndrew Kelley committed on 1/22/2024, 3:31:13 AMparente9c7ebe
1 file changedLine totals unavailable