Clean up TODO for JSCredentialManager

Bug: 435047
Change-Id: I87b417cb779efd69d9b5ab2c7fa5a331b1aea19a
Reviewed-on: https://chromium-review.googlesource.com/702237Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Commit-Queue: Tomasz Garbus <tgarbus@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506698}

ios/chrome/browser/passwords/credential_manager.h

@@ -13,8 +13,7 @@ class WebState;
 
 // Owned by PasswordController. It is responsible for registering and handling
 // callbacks for JS methods |navigator.credentials.*|.
-// TODO(crbug.com/435047): Implement JSCredentialManager responsible for
-// sending results back to website. Expected flow of CredentialManager class:
+// Expected flow of CredentialManager class:
 // 0. Add script command callbacks, initialize JSCredentialManager
 // 1. A command is sent from JavaScript to the browser.
 // 2. HandleScriptCommand is called, it parses the message and constructs a