scouting: Reduce number of Auto balls to 5

As per Andrew Morris, there are only 5 balls to deal with. The picture
added in a previous patch also only shows 5 options.

Signed-off-by: Philipp Schrader <philipp.schrader@gmail.com>
Change-Id: I2215354dc9effaa42523b72855b3e2b1caf768ce
diff --git a/scouting/www/entry/entry.ng.html b/scouting/www/entry/entry.ng.html
index c993467..2856b29 100644
--- a/scouting/www/entry/entry.ng.html
+++ b/scouting/www/entry/entry.ng.html
@@ -29,7 +29,6 @@
                 <input type="checkbox" name="balls" value="3" id="ball-3"><label for="ball-3">Ball 3</label>
                 <input type="checkbox" name="balls" value="4" id="ball-4"><label for="ball-4">Ball 4</label><br>
                 <input type="checkbox" name="balls" value="5" id="ball-5"><label for="ball-5">Ball 5</label>
-                <input type="checkbox" name="balls" value="6" id="ball-6"><label for="ball-6">Ball 6</label>
             </form>
         </div>
         <div class="row">