Since these are just interpreted comments, there's 0 impact on actual code.
This removes all lines that match /* vim: set(.*)tw=80: */ with S&R -- there are
a few others scattered around which will be removed manually in a second part.
The SHGetKnownFolderPath function declaration is exposed since [85edb1c711] so we no longer need to GetProcAddress("SHGetKnownFolderPath") and we can call it directly.
Also remove a redundant #include <shlobj.h>.