[libc++] Revert "[libcxx] Fix copy_move.pass test"

This reverts commit be9f55f.

The commit was both not approved by the libc++ review group, and also
the only change it contained was incorrect.

Author: ldionne

libcxx/test/std/utilities/function.objects/func.wrap/func.wrap.func/func.wrap.func.con/copy_move.pass.cpp

@@ -8,7 +8,7 @@
 
 // FIXME: In MSVC mode, even "std::function<int(int)> f(aref);" causes
 // allocations.
-// XFAIL: target=x86_64-pc-windows-msvc && stdlib=libc++ && libcxx-abi-version-1
+// XFAIL: target=x86_64-pc-windows-msvc && stdlib=libc++
 
 // UNSUPPORTED: c++03