[AArch64] Remove AArch64TargetLowering::shouldExpandPartialReductionIntrinsic (NFC) (#159546)

The AArch64 implementation now matches the base implementation.

Author: MacDue

llvm/lib/Target/AArch64/AArch64ISelLowering.cpp

@@ -2182,13 +2182,6 @@ bool AArch64TargetLowering::shouldExpandGetActiveLaneMask(EVT ResVT,
   return false;
 }
 
-bool AArch64TargetLowering::shouldExpandPartialReductionIntrinsic(
-    const IntrinsicInst *I) const {
-  assert(I->getIntrinsicID() == Intrinsic::vector_partial_reduce_add &&
-         "Unexpected intrinsic!");
-  return true;
-}
-
 bool AArch64TargetLowering::shouldExpandCttzElements(EVT VT) const {
   if (!Subtarget->isSVEorStreamingSVEAvailable())
     return true;

llvm/lib/Target/AArch64/AArch64ISelLowering.h

@@ -523,9 +523,6 @@ class AArch64TargetLowering : public TargetLowering {
 
   bool shouldExpandGetActiveLaneMask(EVT VT, EVT OpVT) const override;
 
-  bool
-  shouldExpandPartialReductionIntrinsic(const IntrinsicInst *I) const override;
-
   bool shouldExpandCttzElements(EVT VT) const override;
 
   bool shouldExpandVectorMatch(EVT VT, unsigned SearchSize) const override;