[m-rev.] diff: update README.MS-Windows

[Julien Fischer]

Update README.MS-Windows.

README.MS-Windows:
     Update the list of Windows versions we have tested on.

     We do not support XP or Vista anymore.

Julien.

diff --git a/README.MS-Windows b/README.MS-Windows
index 78687d3..5b11d8e 100644
--- a/README.MS-Windows
+++ b/README.MS-Windows
@@ -6,16 +6,11 @@ Supported versions of Windows

  Mercury has been tested with the following versions of Windows:

-    * Windows XP SP3
      * Windows 7
-    * Windows Server 2008 R2
-
-It should also work with Windows XP SP2 and Windows Vista but we have
-not tested it with those.
+    * Windows 10

  We no longer actively maintain support for older versions of Windows.

-
  ---------------------------
  Building Mercury on Windows
  ---------------------------
@@ -40,7 +35,6 @@ MS Visual C compiler.
  NOTE: while a Unix emulation environment is required to build Mercury on
  Windows, one is NOT required to use Mercury on Windows.

-
  -------------------------------------
  Building Mercury for Windows on Linux
  -------------------------------------