Delete dead links to postgresql and scheme bindings.

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@@ -57,11 +57,6 @@ uid                  Niels Möller <nisse@lysator.liu.se>
   <dt> <a href="http://pike.lysator.liu.se">Pike</a></dt>
   <dd> An object-oriented interpreted language with C-like syntax.
     Nettle bindings are included with the official distribution.</dd>
-  <dt> <a href='http://www.yellowbank.com/code/PostgreSQL/y_crypto/'>PostgreSQL</a></dt>
-  <dd> Bindings for the Postgres database, by Ron Peterson. </dd>
-  <dt> <a href='http://marcomaggi.github.com/nausicaa.html'>R6RS
-       Scheme</a></dt>
-  <dd> Scheme bindings by Marco Maggi, supporting multiple R6RS implementations.</dd>
   <dt> <a href='https://crates.io/crates/nettle'>Rust</a> </dt>
   <dd> Rust bindings by Kai Michaelis. </dd>
   <dt> TCL </dt>