Build functor cache for debug builds

Hlt/HltCache/CMakeLists.txt

@@ -31,12 +31,6 @@ option(DISABLE_SETTINGS_CACHE
        "Disable building of LoKi Functors Cache for threshold settings."
        FALSE)
 
-# TODO Can (and should) we move the to the nightly slot configuration?
-if(NOT DISABLE_SETTINGS_CACHE AND NOT ($ENV{CMTCONFIG} STREQUAL $ENV{CMTOPT}))
-  message(STATUS "Disabling functor cache for settings for debug platform.")
-  set(DISABLE_SETTINGS_CACHE TRUE)
-endif()
-
 # Import the cache creation module
 include(LoKiFunctorsCache)