[NFC] Fix Sanitizer breakage introduced in llvm#128166 (llvm#128990)

Remove accidental leftover unused variable.

Author: AlexVlx

clang/lib/CodeGen/CGExprAgg.cpp

@@ -303,7 +303,6 @@ void AggExprEmitter::withReturnValueSlot(
   llvm::IntrinsicInst *LifetimeStartInst = nullptr;
   if (!UseTemp) {
     RetAddr = Dest.getAddress();
-    RawAddress RetAllocaAddr = RawAddress::invalid();
   } else {
     RetAddr = CGF.CreateMemTempWithoutCast(RetTy, "tmp");
     llvm::TypeSize Size =

clang/test/OpenMP/amdgcn_sret_ctor.cpp

@@ -19,12 +19,11 @@ E::E() noexcept : foo(s()) {}
 // CHECK-NEXT:    [[THIS_ADDR_ASCAST:%.*]] = addrspacecast ptr addrspace(5) [[THIS_ADDR]] to ptr
 // CHECK-NEXT:    store ptr [[THIS]], ptr [[THIS_ADDR_ASCAST]], align 8
 // CHECK-NEXT:    [[THIS1:%.*]] = load ptr, ptr [[THIS_ADDR_ASCAST]], align 8
-// CHECK-NEXT:    [[THIS1_ASCAST:%.*]] = addrspacecast ptr [[THIS1]] to ptr addrspace(5)
-// CHECK-NEXT:    call void @_Z1sv(ptr addrspace(5) dead_on_unwind writable sret([[STRUCT_S:%.*]]) align 1 [[THIS1_ASCAST]]) #[[ATTR2:[0-9]+]]
+// CHECK-NEXT:    [[FOO:%.*]] = getelementptr inbounds nuw [[STRUCT_E:%.*]], ptr [[THIS1]], i32 0, i32 0
+// CHECK-NEXT:    [[FOO_ASCAST:%.*]] = addrspacecast ptr [[FOO]] to ptr addrspace(5)
+// CHECK-NEXT:    call void @_Z1sv(ptr addrspace(5) dead_on_unwind writable sret([[STRUCT_S:%.*]]) align 1 [[FOO_ASCAST]]) #[[ATTR2:[0-9]+]]
 // CHECK-NEXT:    ret void
 //
-// CHECK-LABEL: declare void @_Z1sv(
-// CHECK-SAME: ptr addrspace(5) dead_on_unwind writable sret([[STRUCT_S]]) align 1) #[[ATTR1:[0-9]+]]
 //
 // CHECK-LABEL: define hidden void @_ZN1EC1Ev(
 // CHECK-SAME: ptr noundef nonnull align 1 dereferenceable(1) [[THIS:%.*]]) unnamed_addr #[[ATTR0]] align 2 {