indentlog: refactor: move stream-inserters to print/ subdir

include/indentlog/array.hpp

@@ -1,25 +0,0 @@
-/* @file array.hpp */
-
-#pragma once
-
-#include <iostream>
-#include <array>
-
-namespace std {
-    template<typename T, size_t N>
-    inline std::ostream &
-    operator<<(std::ostream & os,
-               std::array<T, N> const & v)
-    {
-        os << "[";
-        for(size_t i = 0; i < N; ++i) {
-            if(i > 0)
-                os << " ";
-            os << v[i];
-        }
-        os << "]";
-        return os;
-    } /*operator<<*/
-} /*namespace std*/
-
-/* end array.hpp */