Fix std::filesystem::remove on ReFS targets (#407)

* Fix std::filesystem::remove on ReFS targets by falling back to standard delete on ERROR_NOT_SUPPORTED.

Resolves DevCom-857535.

stl/src/filesystem.cpp

@@ -657,11 +657,15 @@ __std_win_error __stdcall __std_fs_get_file_id(__std_fs_file_id* const _Id, cons
     }
 
     _Last_error = __std_win_error{GetLastError()};
-    if (_Last_error != __std_win_error::_Invalid_parameter && _Last_error != __std_win_error::_Invalid_function) {
+    switch (_Last_error) {
+    case __std_win_error::_Invalid_parameter: // Older Windows versions
+    case __std_win_error::_Invalid_function: // Windows 10 1607
+    case __std_win_error::_Not_supported: // POSIX delete not supported by the file system
+        break; // try non-POSIX delete below
+    default:
         return {false, _Last_error};
     }
 
-    // Filesystem without POSIX delete support, or older than Windows 10 RS1 version without such support:
     FILE_DISPOSITION_INFO _Info{/* .Delete= */ TRUE};
     if (_SetFileInformationByHandle(_Handle._Get(), FileDispositionInfo, &_Info, sizeof(_Info))) {
         return {true, __std_win_error::_Success};