maintenance.php: remove outdated FAQ entries

These items appear to date back to before AltLabels were introduced on CHM,

devel/manual/maintenance.php

@@ -221,17 +221,6 @@ function, and delete the old waypoints that are not in use. Add the new
 1000-line files every few weeks when the changes don't reflect real 
 changes to highway alignments or real changes to the extent of their 
 travels.</li> <br />
-<li><a name="order"></a><a style="text-decoration:none" href="#order">&#x1f517</a>
-Q: Is there a preference for the order of hidden/visible pairs of same-location waypoints? <br /> <br />
-A: The visible label should always come first.</li><br />
-<li><a name="delaltlabels"></a><a style="text-decoration:none" href="#delaltlabels">&#x1f517</a>
-Q: Can I delete unused hidden points with a visible companion point? <br /> <br />
-A: If you have verified that a hidden point isn't in use (we
-have <a href="/logs/unusedaltlabels.log">a log
-      file for that</a>) and that there 
-is a visible point at the same location, then you can delete the unused 
-hidden point. Just make sure you don't accidentally remove a shaping 
-point or a used point or a not-duplicated point.</li> <br />
 <li><a name="updatenote"></a><a style="text-decoration:none" href="#updatenote">&#x1f517</a>
 Q: I made a necessary change that will unavoidably break a route for 
 some users. So would you include "Update your .list file if you've