[VPlan] Remove dead ToRemove (NFC).

Author: fhahn

llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp

@@ -588,7 +588,6 @@ static SmallVector<VPUser *> collectUsersRecursively(VPValue *V) {
 /// vector extracts.
 static void legalizeAndOptimizeInductions(VPlan &Plan) {
   using namespace llvm::VPlanPatternMatch;
-  SmallVector<VPRecipeBase *> ToRemove;
   VPBasicBlock *HeaderVPBB = Plan.getVectorLoopRegion()->getEntryBasicBlock();
   bool HasOnlyVectorVFs = !Plan.hasVF(ElementCount::getFixed(1));
   VPBuilder Builder(HeaderVPBB, HeaderVPBB->getFirstNonPhi());