Remove unused include. NFC.

llvm-svn: 286250

llvm/lib/Transforms/IPO/ArgumentPromotion.cpp

@@ -40,7 +40,6 @@
 #include "llvm/Analysis/CallGraphSCCPass.h"
 #include "llvm/Analysis/Loads.h"
 #include "llvm/Analysis/TargetLibraryInfo.h"
-#include "llvm/Analysis/ValueTracking.h"
 #include "llvm/IR/CFG.h"
 #include "llvm/IR/CallSite.h"
 #include "llvm/IR/Constants.h"