[wasm] Remove dead declarations from {WasmJs} API.

R=clemensh@chromium.org

Change-Id: Ifcd5d58bd27754d5ba7d05b302dc6089af5e3a53
Reviewed-on: https://chromium-review.googlesource.com/892074Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50957}

src/wasm/wasm-js.h

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef V8_WASM_JS_H_
-#define V8_WASM_JS_H_
+#ifndef V8_WASM_WASM_JS_H_
+#define V8_WASM_WASM_JS_H_
 
-#include "src/allocation.h"
-#include "src/base/hashmap.h"
+#include "src/globals.h"
 
 namespace v8 {
 namespace internal {
@@ -16,14 +15,9 @@ class WasmJs {
  public:
   V8_EXPORT_PRIVATE static void Install(Isolate* isolate,
                                         bool exposed_on_global_object);
-
-  // WebAssembly.Table.
-  static bool IsWasmTableObject(Isolate* isolate, Handle<Object> value);
-
-  // WebAssembly.Memory
-  static bool IsWasmMemoryObject(Isolate* isolate, Handle<Object> value);
 };
 
 }  // namespace internal
 }  // namespace v8
-#endif
+
+#endif  // V8_WASM_WASM_JS_H_