Removing unused files. The calendar admin interface was completely broken and replaced during the Hamburg bug bash (kudos to Lars). Most of the code in the removed files basically duplicated OpenACS code from somewhere else. Now that calendar is making proper use of OpenACS this stuff is a) not necessary anymore and b) has never worked anyway.
debugged the query and the corresponding page. calendar-preferences now syntactically works fine, however I am not sure about the supposed semantics of this page...