[mdoc] Flush expected output.

[mdoc] Flush expected output.

Commit 0a2c38df changed Delegate.Remove() so that it uses
Locale.GetText(), which thus introduces additional exceptions which
can be possibly thrown from Delegate.Remove().

This is similar to the situation in corlib/3d3fe6af (added
Locale.GetText() use) and mdoc/574dbc8e (updated unit tests).