[ORC] Remove an unused header. NFC.

Author: lhames

llvm/tools/llvm-jitlink/llvm-jitlink.cpp

@@ -17,7 +17,6 @@
 #include "llvm/Config/llvm-config.h" // for LLVM_ON_UNIX, LLVM_ENABLE_THREADS
 #include "llvm/ExecutionEngine/Orc/AbsoluteSymbols.h"
 #include "llvm/ExecutionEngine/Orc/COFFPlatform.h"
-#include "llvm/ExecutionEngine/Orc/COFFVCRuntimeSupport.h"
 #include "llvm/ExecutionEngine/Orc/DebugObjectManagerPlugin.h"
 #include "llvm/ExecutionEngine/Orc/Debugging/DebugInfoSupport.h"
 #include "llvm/ExecutionEngine/Orc/Debugging/DebuggerSupportPlugin.h"