removed erroneous messages

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@@ -545,7 +545,8 @@ <h4 class="post-subtitle">Class <script type="text/javascript">document.write(cd
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                     <div class="col-lg-3 post-preview">
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-                            <li><a tabindex="-1" href="./slides/CS660-Fall2023-Class17.pdf">Slides (for Classes 17-19)</a></li>
+                            <!-- <li><a tabindex="-1" href="./slides/CS660-Fall2023-Class17.pdf">Slides (for Classes 17-19)</a></li> -->
+                            <li><a tabindex="-1" href="./slides/CS660-Fall2023-Class17.pdf">Slides</a></li>
                             <li><a href="https://web.archive.org/web/20070718223542/http://www.noncombatant.org/trove/fitzpatrick-anecdotes.pdf"><i class="fa fa-file-text-o" aria-hidden="true"></i></a>"More on the Halloween Problem"</li>
                             <li><a href="http://pages.cs.wisc.edu/~dbbook/" target="_blank"><i class="fa fa-book fa-6" aria-hidden="true"></i></a> Chapter 12 &amp; 14.1-14.3</li>
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@@ -631,7 +632,8 @@ <h4 class="post-subtitle">Class <script type="text/javascript">document.write(cd
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                         <ul>
-                            <li><a tabindex="-1" href="./slides/CS660-Fall2023-Class22.pdf">Slides (for Classes 22-23)</a></li>
+                            <!-- <li><a tabindex="-1" href="./slides/CS660-Fall2023-Class22.pdf">Slides (for Classes 22-23)</a></li> -->
+                            <li><a tabindex="-1" href="./slides/CS660-Fall2023-Class22.pdf">Slides</a></li>
                             <li><a href="http://pages.cs.wisc.edu/~dbbook/" target="_blank"><i class="fa fa-book fa-6" aria-hidden="true"></i></a> Chapter 17.1-17.5</li>
                         </ul>
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