[conv.qual] Remove unused definition of 'cv-qualification signature'

Author: lprv

source/expressions.tex

@@ -779,10 +779,6 @@
 as ``pointer to \tcode{\keyword{const} \keyword{int}}'', and
 as ``pointer to pointer to \tcode{\keyword{const} \keyword{int}}''.
 \end{example}
-The $n$-tuple of cv-qualifiers after the first one
-in the longest qualification-decomposition of \tcode{T}, that is,
-$\cv{}_1, \cv{}_2, \dotsc, \cv{}_n$, is called the
-\defn{cv-qualification signature} of \tcode{T}.
 
 \pnum
 \indextext{type!similar|see{similar types}}%