docs: update docs for unchecked duration subtr. lint

Author: nfejzic

src/docs/unchecked_duration_subtraction.txt

@@ -2,7 +2,7 @@
 Finds patterns of unchecked subtraction of [`Duration`] from [`Instant::now()`].
 
 ### Why is this bad?
-Unchecked subtraction could cause underflow on certain platforms, leading to bugs and/or
+Unchecked subtraction could cause underflow on certain platforms, leading to
 unintentional panics.
 
 ### Example