NullablePointer support not available, so drop these tests.

diff --git a/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc b/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc.new
index 2f75d12..6fb19c3 100644
--- a/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc
+++ b/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc
@@ -145,20 +145,6 @@ main()
   std::unique_ptr<data>& rarrptr = arrptr;
 // { dg-final { regexp-test rarrptr {std::unique_ptr.datum \[\]. = {get\(\) = 0x.*}} } }
 
-  struct Deleter
-  {
-    int deleter_member = -1;
-    using pointer = __gnu_test::NullablePointer<void>;
-    void operator()(pointer) const noexcept { }
-  };
-  static_assert( !std::is_empty<Deleter>(), "Deleter is not empty" );
-  static_assert( std::is_empty<Deleter::pointer>(), "but pointer is empty" );
-
-  std::unique_ptr<int, Deleter> empty_ptr;
-// { dg-final { note-test empty_ptr {std::unique_ptr<int> = {get() = {<No data fields>}}} } }
-  std::unique_ptr<int, Deleter>& rempty_ptr = empty_ptr;
-// { dg-final { note-test rempty_ptr {std::unique_ptr<int> = {get() = {<No data fields>}}} } }
-
   struct Deleter_pr103086
   {
     int deleter_member = -1;