Remove ctd

the CTD was a stand-in for the TRD. Remove it to make place for actual realistic tracker options.

reference_detector.xml

@@ -118,7 +118,6 @@
   <include ref="compact/ecal.xml"/>
   <include ref="compact/hcal.xml"/>
   <include ref="compact/ce_GEM.xml"/>
-  <include ref="compact/cb_CTD_Si.xml"/>
   <include ref="compact/vertex_tracker.xml"/>
   <include ref="compact/gem_tracker_endcap.xml"/>
   <include ref="compact/ce_mrich.xml"/>