[cleanup] Remove ParameterMode from RegExpPrototypeSplitBody

INTPTR_PARAMETERS is deduced from reg, which is an TNode<IntPtrT>.

Bug: v8:9708, v8:6949
Change-Id: I84c4e5803602ecc2d9284bce46409a384e93a035
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2212265Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68009}

src/builtins/builtins-regexp-gen.cc

@@ -1354,7 +1354,6 @@ TNode<JSArray> RegExpBuiltinsAssembler::RegExpPrototypeSplitBody(
   const TNode<IntPtrT> int_limit = SmiUntag(limit);
 
   const ElementsKind kind = PACKED_ELEMENTS;
-  const ParameterMode mode = CodeStubAssembler::INTPTR_PARAMETERS;
 
   const TNode<NativeContext> native_context = LoadNativeContext(context);
   TNode<Map> array_map = LoadJSArrayElementsMap(kind, native_context);
@@ -1508,10 +1507,10 @@ TNode<JSArray> RegExpBuiltinsAssembler::RegExpPrototypeSplitBody(
         const TNode<IntPtrT> reg = var_reg.value();
         const TNode<Object> from = LoadFixedArrayElement(
             match_indices, reg,
-            RegExpMatchInfo::kFirstCaptureIndex * kTaggedSize, mode);
+            RegExpMatchInfo::kFirstCaptureIndex * kTaggedSize);
         const TNode<Smi> to = CAST(LoadFixedArrayElement(
             match_indices, reg,
-            (RegExpMatchInfo::kFirstCaptureIndex + 1) * kTaggedSize, mode));
+            (RegExpMatchInfo::kFirstCaptureIndex + 1) * kTaggedSize));
 
         Label select_capture(this), select_undefined(this), store_value(this);
         TVARIABLE(Object, var_value);