Remove ReactDOMRe.createElementVariadic

It's actually not needed for react-jsx v3 usage

Author: ryyppy

src/legacy/ReactDOMRe.res

@@ -1,5 +1,5 @@
 /**
-This module is kept for ReScript react-jsx <= v3 compatibility
+This module is kept for ReScript react-jsx v3 compatibility
 We removed all functionality that is not needed for JSX usage
 **/
 
@@ -19,23 +19,3 @@ external createDOMElementVariadic: (
 @bs.splice @bs.val @bs.module("react")
 external createElement: (string, ~props: props=?, array<React.element>) => React.element =
   "createElement"
-
-/* Only wanna expose createElementVariadic here. Don't wanna write an interface file */
-include (
-  /* Use varargs to avoid the ReactJS warning for duplicate keys in children */
-  {
-    @bs.val @bs.module("react")
-    external createElementInternalHack: 'a = "createElement"
-
-    @bs.send
-    external apply: ('theFunction, 'theContext, 'arguments) => 'returnTypeOfTheFunction = "apply"
-
-    let createElementVariadic = (domClassName, ~props=?, children) => {
-      let variadicArguments =
-        [Obj.magic(domClassName), Obj.magic(props)] |> Js.Array.concat(children)
-      createElementInternalHack->apply(Js.Nullable.null, variadicArguments)
-    }
-  }: {
-    let createElementVariadic: (string, ~props: props=?, array<React.element>) => React.element
-  }
-)

src/legacy/ReasonReact.res

@@ -1,5 +1,6 @@
 /**
-This module is only kept for react-jsx <= v3 compatibility
+This module is kept for ReScript react-jsx v3 compatibility
 We removed all functionality that is not needed for JSX usage
 **/
+
 @bs.module("react") external fragment: 'a = "Fragment"