[cmake] HistFractory does not seem to need GSL, really.

cda568b7 · Axel Naumann · a9093d2b · cda568b7
Commit cda568b7 authored 6 years ago by Axel Naumann
--- a/roofit/CMakeLists.txt
+++ b/roofit/CMakeLists.txt
 add_subdirectory(roofitcore)
 add_subdirectory(roofit)
 add_subdirectory(roostats)
-find_package(GSL)
-if((xml OR ROOT_xml_FOUND) AND GSL_FOUND)
+if(xml)
  add_subdirectory(histfactory)
 endif()