config-mingw: Remove support for Borland, egcs/gnu-win32 and lcc-win32 compiler
config-mingw: Remove support for Borland, egcs/gnu-win32 and lcc-win32 compiler

thewtex/python-cmake-buildsystem,python-cmake-buildsystem/python-cmake-buildsystem,adrianbroher/python-cmake-buildsystem,davidsansome/python-cmake-buildsystem,thewtex/python-cmake-buildsystem