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

2020/ferguson2/index.html

@@ -988,8 +988,6 @@ href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/tr
 <li><a
 href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/enigma.1">enigma.1</a>
 - Enigma simulator man page</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/ferguson2/key.txt">key.txt</a>
 - key to decipher or encipher IOCCC</li>