test: Remove an essentially obsolete testcase for __dios::new_object.

test/dios/internal/new-delete-object-a.cpp

-/* TAGS: min c++ */
-/* CC_OPTS: -std=c++11 */
-#include <dios/sys/stdlibwrap.hpp>
-#include <cassert>
-
-volatile int done;
-
-struct Item {
-    int val;
-
-    Item( int val = 42 ) : val( val ) { }
-    ~Item() { done++; }
-};
-
-int main() {
-    done = 0;
-
-    auto a = __dios::new_object< Item >( );
-    assert( a );
-    assert( a->val == 42 );
-
-    auto b = __dios::new_object< Item >( 1 );
-    assert( b );
-    assert( b->val == 1 );
-
-    __dios::delete_object( a );
-    assert( done == 1 );
-    __dios::delete_object( b );
-    assert( done == 2 );
-
-    if ( __vm_choose( 2 ) )  a->val = 8; else  b->val = 8; /* ERROR */
-
-    return 0;
-}