Removing MinGW cross-compilation scenario?

[Stephan Bergmann]

Any objections against removing on master the code that allowed to build 
LO for Windows on Linux via MinGW?

I think it is generally considered a failed attempt by now, and I assume 
the code is already rotting.  But there is still code around which 
occasionally becomes the target of fruitless maintenance, see e.g. 
<https://cgit.freedesktop.org/libreoffice/core/commit/?id=f8e77c0894f5eb4495edb79a387f0deb63830226> 
"Revert 'tdf#99589 tolower changed to rtl::toAsciiLowerCase'".