docs: drop the predecessor comparisons from comments and tests

text/src/inline.rs

@@ -2,9 +2,7 @@
 //!
 //! Plain text has no markup to carry emphasis, so it is dropped and the words
 //! kept. A link becomes `label (url)`: self-contained, and readable without
-//! scrolling to a reference list somewhere else. md2txt's `text` renderer emits
-//! numbered markers instead but never writes the list they point at, so the
-//! numbers lead nowhere.
+//! scrolling to a reference list somewhere else.
 
 use itsybitsy_core::ir::{Doc, Inline};