Delete some unused variables

Author: gottesmm

lib/SILOptimizer/LoopTransforms/LoopUnroll.cpp

@@ -392,7 +392,6 @@ static bool tryToUnrollLoop(SILLoop *Loop) {
   auto *Preheader = Loop->getLoopPreheader();
   if (!Preheader)
     return false;
-  SILModule &M = Preheader->getParent()->getModule();
 
   auto *Latch = Loop->getLoopLatch();
   if (!Latch)

lib/SILOptimizer/Mandatory/ConsumeOperatorCopyableValuesChecker.cpp

@@ -436,7 +436,6 @@ bool ConsumeOperatorCopyableValuesChecker::check() {
              << "Found at least one value to check, performing checking.\n");
   auto valuesToProcess =
       llvm::ArrayRef(valuesToCheck.begin(), valuesToCheck.end());
-  auto &mod = fn->getModule();
 
   // If we do not emit any diagnostics, we need to put in a break after each dbg
   // info carrying inst for a lexical value that we find a move on. This ensures

lib/SILOptimizer/Mandatory/DiagnoseUnreachable.cpp

@@ -658,7 +658,6 @@ static void setOutsideBlockUsesToUndef(SILInstruction *I) {
     return;
 
   SILBasicBlock *BB = I->getParent();
-  auto *F = BB->getParent();
 
   // Replace all uses outside of I's basic block by undef.
   llvm::SmallVector<Operand *, 16> Uses;