PrettyPageHandler: remove deprecated notices
PrettyPageHandler: remove deprecated notices

Until we handle deprecated errors in a graceful manner,
triggering this aborts the application, which defeats the purpose of compatibility.
Also see issue #100.

staabm/whoops,nonconforme/whoops,UnderDogg/whoops,emilkje/whoops,michabbb-backup/whoops,stefen/whoops,filp/whoops,emilkje/whoops,oligriffiths/whoops,staabm/whoops,filp/whoops,stefen/whoops,nonconforme/whoops,oligriffiths/whoops,UnderDogg/whoops,Vmak11/whoops,michabbb-backup/whoops,Vmak11/whoops