[ntuple] Always build tree/ntupleutil

All RNTuple code should always compile, while some interfaces remain
in ROOT::Experimental.

Author: hahnjo

config/root-config.in

@@ -74,7 +74,7 @@ newlib="-lNew"
 rootglibs="-lGui"
 rootevelibs="-lEve -lEG -lGeom -lGed -lRGL"
 rootlibs="-lCore -lImt -lRIO -lNet -lHist -lGraf -lGraf3d -lGpad -lROOTVecOps -lTree -lTreePlayer\
-          -lRint -lPostscript -lMatrix -lPhysics -lMathCore -lThread -lROOTNTuple"
+          -lRint -lPostscript -lMatrix -lPhysics -lMathCore -lThread -lROOTNTuple -lROOTNTupleUtil"
 
 # MultiProc is not supported on Windows
 if test "$platform" != "win32"; then
@@ -85,10 +85,6 @@ if echo "${features}" | grep -q "dataframe"; then
    rootlibs="$rootlibs -lROOTDataFrame"
 fi
 
-if echo "${features}" | grep -q "root7"; then
-   rootlibs="$rootlibs -lROOTNTupleUtil"
-fi
-
 if test "$platform" = "win32"; then
    rootulibs="-include:_G__cpp_setupG__Net        \
               -include:_G__cpp_setupG__IO         \

tree/ntupleutil/CMakeLists.txt

@@ -9,10 +9,6 @@
 # @author Jakob Blomer CERN
 ############################################################################
 
-if(NOT root7)
-  return()
-endif()
-
 ROOT_STANDARD_LIBRARY_PACKAGE(ROOTNTupleUtil
 HEADERS
   ROOT/RNTupleImporter.hxx