[llvm-jitlink] Remove unused struct member.

Author: lhames

llvm/tools/llvm-jitlink/llvm-jitlink.h

@@ -36,7 +36,6 @@ struct Session {
   orc::JITDylib *MainJD = nullptr;
   orc::ObjectLinkingLayer ObjLayer;
   orc::JITDylibSearchOrder JDSearchOrder;
-  std::vector<std::string> LibrarySearchPaths;
 
   ~Session();