Remove variant

The python27 variant is not necessary any more.  Python tools are automatically installed (and will be compatible with the installed python).

installation-mac.html

@@ -88,7 +88,7 @@ <h3>Development environment installation</h3>
 
 <p>Once all this is done, you should be able to compile Gregorio.</p>
 
-<p>If you want to compile fonts (to modify them, or when building directly from git), do <code>sudo port install fontforge +python27</code>.</p>
+<p>If you want to compile fonts (to modify them, or when building directly from git), do <code>sudo port install fontforge</code>.</p>
 
 <p>If you intend to aid in development, then there are a couple of more packages which will come in handy: <code>sudo port install python27 ImageMagick coreutils</code>