Worker: Remove unused WorkerClassicScriptLoader::CachedMetadata()

Bug: n/a
Change-Id: Id609b13a2bc3dbe67652a18f3d8344e52d24ae12
TBR: nhiroki@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/1282502
Commit-Queue: Hiroki Nakagawa <nhiroki@chromium.org>
Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599867}

third_party/blink/renderer/core/workers/worker_classic_script_loader.h

@@ -93,7 +93,6 @@ class CORE_EXPORT WorkerClassicScriptLoader final
   std::unique_ptr<Vector<char>> ReleaseCachedMetadata() {
     return std::move(cached_metadata_);
   }
-  const Vector<char>* CachedMetadata() const { return cached_metadata_.get(); }
 
   ContentSecurityPolicy* GetContentSecurityPolicy() {
     return content_security_policy_.Get();