TODO: remove some items

Those items have now been implemented:

  - mingw32 target
    we have it now, and even mingw64 too

  - mingw32 host
    it is certainly possible to canadian-build a toolchain to run
    in a mingw host

  - Cygwin host
    it is possible to build a toolchain in Cygwin, and it is probably
    possible to canadian-build it as well

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

TODO

@@ -18,16 +18,6 @@ Non-recurring tasks:
 - Cygwin target (needs newlib)
   - so we can build toolchains that generate code for Windows/Cygwin
 
-- Cygwin host
-  - so we can build toolchains that run natively under Windows/Cygwin
-
-- mingw32 target
-  - so we can build toolchains that generate code for Windows/Win32
-
-- mingw32 host
-  - so we can build toolchains that run natively under Windows/Win32
-    (without requiring Cygwin)
-
 - uClibc++
   - see newlib, above