Remove some cpp includes.

zone/CMakeLists.txt

@@ -111,6 +111,7 @@ set(zone_sources
     xtargetautohaters.cpp
     zone.cpp
     zone_config.cpp
+    zone_loot.cpp
     zonedb.cpp
     zone_base_data.cpp
     zone_event_scheduler.cpp

zone/zone.cpp

@@ -3584,5 +3584,3 @@ std::vector<std::string> Zone::GetTimers()
 
 	return v;
 }
-
-#include "zone_loot.cpp"