fix imt link

Author: ferdymercury

core/imt/CMakeLists.txt

@@ -19,13 +19,13 @@ ROOT_LINKER_LIBRARY(Imt
     src/TTaskGroup.cxx
   DEPENDENCIES
     ${MULTIPROC_LIB}
-  LIBRARIES
-    TBB::tbb
 )
 
 target_link_libraries(Imt PRIVATE Thread INTERFACE Core)
 
 if(imt)
+  target_link_libraries(Imt PRIVATE TBB::tbb)
+  
   ROOT_GENERATE_DICTIONARY(G__Imt STAGE1
     ROOT/TTaskGroup.hxx
     ROOT/RTaskArena.hxx