update index.html and .winner.json per recent manifest changes

2020/ferguson1/index.html

@@ -752,8 +752,6 @@ href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson1/pl
 <li><a
 href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson1/snake-colours.sh">snake-colours.sh</a>
 - script to reset - preset colors</li>
-<li><a href="ioccc-and-chocolate.pdf">ioccc-and-chocolate.pdf</a> -
-IOCCC publications</li>
 <li><a
 href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson1/prog.2.c">prog.2.c</a>
 - source with more digraphs</li>