[array.size] Remove full member declaration from itemdecl. (#1790)

Author: jensmaurer

source/containers.tex

@@ -3262,7 +3262,7 @@
 
 \indexlibrarymember{array}{size}%
 \begin{itemdecl}
-template <class T, size_t N> constexpr size_type array<T, N>::size() const noexcept;
+constexpr size_type size() const noexcept;
 \end{itemdecl}
 
 \begin{itemdescr}