Removed The Broke Wiki Link Since It's Gone

It seems like the LWGJL2 wiki has been gone for a few years. 

https://wiki.lwjgl.org

The last working archive was from 2021. It's probably best to remove it if it's never coming back.

client/routes/download/index.tsx

@@ -107,9 +107,6 @@ const DownloadRoute: React.FC = (): JSX.Element => {
           <AnchorButton variant="outline" href="http://legacy.lwjgl.org/" rel="noopener external">
             LWJGL 2 WEBSITE
           </AnchorButton>
-          <AnchorButton variant="outline" href="http://wiki.lwjgl.org/" rel="noopener external">
-            LWJGL 2 WIKI
-          </AnchorButton>
         </Grid>
       </Container>
     </PageView>