Revert "Add SAoC banner"

Author: wilzbach

images/symmetry_autumn_of_code.png

@@ -358,10 +358,6 @@ $(DIVID news,
 
 $(DIVC boxes,
 
-    <a href="https://dlang.org/blog/symmetry-autumn-of-code">
-        <img src="$(ROOT_DIR)images/symmetry_autumn_of_code.png" style="max-width:100%; display: block; margin: 0 auto; padding-top: 0em; padding-bottom: 2em;" />
-    </a>
-
     $(DIVC row,
         $(TOUR newspaper-o, News,
             $(P Stay updated with the latest posts in the