[ScalarEvolution] Remove unused ExitLimit::hasOperand() method (NFC)

We only use BackedgeTakenInfo::hasOperand().

Author: nikic

llvm/include/llvm/Analysis/ScalarEvolution.h

@@ -1340,8 +1340,6 @@ class ScalarEvolution {
              !isa<SCEVCouldNotCompute>(MaxNotTaken);
     }
 
-    bool hasOperand(const SCEV *S) const;
-
     /// Test whether this ExitLimit contains all information.
     bool hasFullInfo() const {
       return !isa<SCEVCouldNotCompute>(ExactNotTaken);

llvm/lib/Analysis/ScalarEvolution.cpp

@@ -12606,14 +12606,6 @@ bool ScalarEvolution::hasOperand(const SCEV *S, const SCEV *Op) const {
   return SCEVExprContains(S, [&](const SCEV *Expr) { return Expr == Op; });
 }
 
-bool ScalarEvolution::ExitLimit::hasOperand(const SCEV *S) const {
-  auto IsS = [&](const SCEV *X) { return S == X; };
-  auto ContainsS = [&](const SCEV *X) {
-    return !isa<SCEVCouldNotCompute>(X) && SCEVExprContains(X, IsS);
-  };
-  return ContainsS(ExactNotTaken) || ContainsS(MaxNotTaken);
-}
-
 void
 ScalarEvolution::forgetMemoizedResults(const SCEV *S) {
   ValuesAtScopes.erase(S);