Remove wxMGL port.

The company behind MGL toolkit (SciTech) doesn't exist since several years and
this port is not used by anybody, so remove it to ease maintenance burden.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70353 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/index.htm

@@ -47,7 +47,6 @@
       <a href="gtk/readme.txt">wxGTK</a>,
       <a href="mac/readme.txt">wxMac</a>,
       <a href="cocoa/readme.txt">wxCocoa</a>,
-      <a href="mgl/readme.txt">wxMGL</a>,
       <a href="motif/readme.txt">wxMotif</a>,
       <a href="x11/readme.txt">wxX11</a>,
       <a href="univ/readme.txt">Univ</a>
@@ -59,7 +58,6 @@
       <a href="x11/install.txt">wxX11</a>,
       <a href="mac/install.txt">wxMac</a>,
       <a href="cocoa/install.txt">wxCocoa</a>,
-      <a href="mgl/install.txt">wxMGL</a>,
       <a href="os2/install.txt">wxOS2</a>
     </li>
     <li><a href="changes.txt"><b>General change log</b></a></li>