[csa][cleanup] Remove unused UnsafeStoreFixedDoubleArrayElement

Bug: v8:9708, v8:6949
Change-Id: I2a60a3970adf3020b42ee1b1264ca3c11f9f88c6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2362955Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69520}

src/codegen/code-stub-assembler.h

@@ -1599,14 +1599,6 @@ class V8_EXPORT_PRIVATE CodeStubAssembler
       TNode<FixedDoubleArray> object, Node* index, TNode<Float64T> value,
       ParameterMode parameter_mode = INTPTR_PARAMETERS,
       CheckBounds check_bounds = CheckBounds::kAlways);
-  // This doesn't emit a bounds-check. As part of the security-performance
-  // tradeoff, only use it if it is performance critical.
-  void UnsafeStoreFixedDoubleArrayElement(
-      TNode<FixedDoubleArray> object, Node* index, TNode<Float64T> value,
-      ParameterMode parameter_mode = INTPTR_PARAMETERS) {
-    return StoreFixedDoubleArrayElement(object, index, value, parameter_mode,
-                                        CheckBounds::kDebugOnly);
-  }
 
   void StoreFixedDoubleArrayElementSmi(TNode<FixedDoubleArray> object,
                                        TNode<Smi> index,