Revert "Merge to upstream r304942."

This reverts commit 83b1388ecd, reversing
changes made to f20819f925.

Test: treehugger
Bug: None

test/std/language.support/support.exception/except.nested/rethrow_if_nested.pass.cpp

@@ -8,10 +8,6 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: libcpp-no-exceptions
-
-// This test fails due to a stack overflow
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // <exception>
 
 // class nested_exception;
@@ -47,7 +43,7 @@ class C
 {
 public:
 	virtual ~C() {}
-	C * operator&() const { assert(false); return nullptr; } // should not be called
+	C * operator&() const { assert(false); } // should not be called
 };
 
 class D : private std::nested_exception {};

test/std/language.support/support.exception/except.nested/throw_with_nested.pass.cpp

@@ -107,16 +107,6 @@ int main()
             assert(i == 7);
         }
     }
-    {
-        try
-        {
-            std::throw_with_nested("String literal");
-            assert(false);
-        }
-        catch (const char *)
-        {
-        }
-    }
 #if TEST_STD_VER > 11
     {
         try