Remove ancient paranoia

In the '90s we used to run autoconf three times, just in case
(because it really didn't work the first time).  "Three" was modeled
after the "sync; sync; sync; reboot" incantation of the '80s.

Hopefully we are past this by now.

bootstrap.sh

@@ -14,11 +14,8 @@ touch ChangeLog
 
 echo "PLEASE IGNORE WARNINGS AND ERRORS"
 
-# paranoia: sometimes autoconf doesn't get things right the first time
 rm -rf autom4te.cache
 autoreconf --verbose --install --symlink --force
-autoreconf --verbose --install --symlink --force
-autoreconf --verbose --install --symlink --force
 
 rm -f config.cache