remove not needed swap specialisation

alib2std/src/extensions/ptr_array.hpp

@@ -247,11 +247,6 @@ public:
 namespace std {
-template < class ... Ts >
-void swap ( ext::ptr_array < Ts ... > & first, ext::ptr_array < Ts ... > & second ) {
-	first.swap ( second );
-}
-
 template < std::size_t I, class Type, std::size_t N >
 auto & get ( ext::ptr_array < Type, N > & tpl ) {
 	return tpl.template get < I > ( );

alib2std/src/extensions/ptr_tuple.hpp

@@ -185,11 +185,6 @@ bool operator >= ( const ptr_tuple < T > & first, const ptr_tuple < T > & second
 namespace std {
-template < class ... Ts >
-void swap ( ext::ptr_tuple < Ts ... > & first, ext::ptr_tuple < Ts ... > & second ) {
-	first.swap ( second );
-}
-
 template < std::size_t I, class ... Types >
 auto & get ( ext::ptr_tuple < Types ... > & tpl ) {
 	return tpl.template get < I > ( );

alib2std/src/extensions/ptr_vector.hpp

@@ -349,19 +349,6 @@ public:
 };
-} /* namespace ext */
-
-namespace std {
-
-template < class ... Ts >
-void swap ( ext::ptr_vector < Ts ... > & first, ext::ptr_vector < Ts ... > & second ) {
-	first.swap ( second );
-}
-
-} /* namespace std */
-
-namespace ext {
-
 template< class T >
 std::ostream& operator<<(std::ostream& out, const ext::ptr_vector < T > & ptr_vector) {
 	out << "[";