[ConstantFolding] Remove ConstantFoldLoadThroughGEPIndices() API (NFC)

The last user of this API went away in
4f5e9a2.

Author: nikic

llvm/include/llvm/Analysis/ConstantFolding.h

@@ -150,13 +150,6 @@ Constant *ConstantFoldLoadThroughGEPConstantExpr(Constant *C, ConstantExpr *CE,
                                                  Type *Ty,
                                                  const DataLayout &DL);
 
-/// ConstantFoldLoadThroughGEPIndices - Given a constant and getelementptr
-/// indices (with an *implied* zero pointer index that is not in the list),
-/// return the constant value being addressed by a virtual load, or null if
-/// something is funny and we can't decide.
-Constant *ConstantFoldLoadThroughGEPIndices(Constant *C,
-                                            ArrayRef<Constant *> Indices);
-
 /// canConstantFoldCallTo - Return true if its even possible to fold a call to
 /// the specified function.
 bool canConstantFoldCallTo(const CallBase *Call, const Function *F);

llvm/lib/Analysis/ConstantFolding.cpp

@@ -1354,19 +1354,6 @@ Constant *llvm::ConstantFoldLoadThroughGEPConstantExpr(Constant *C,
   return ConstantFoldLoadThroughBitcast(C, Ty, DL);
 }
 
-Constant *
-llvm::ConstantFoldLoadThroughGEPIndices(Constant *C,
-                                        ArrayRef<Constant *> Indices) {
-  // Loop over all of the operands, tracking down which value we are
-  // addressing.
-  for (Constant *Index : Indices) {
-    C = C->getAggregateElement(Index);
-    if (!C)
-      return nullptr;
-  }
-  return C;
-}
-
 //===----------------------------------------------------------------------===//
 //  Constant Folding for Calls
 //