Bug 1803984 - Part 2: Add assertion that we only remove unlinked modules from the map r=allstarschh

It would not be correct to remove modules that were already linked or evaluated.



Depends on D178298

Differential Revision: https://phabricator.services.mozilla.com/D178787

js/loader/ModuleLoaderBase.h

@@ -314,6 +314,8 @@ class ModuleLoaderBase : public nsISupports {
 
   nsresult GetFetchedModuleURLs(nsTArray<nsCString>& aURLs);
 
+  // Removed a fetched module from the module map. Asserts that the module is
+  // unlinked. Extreme care should be taken when calling this method.
   bool RemoveFetchedModule(nsIURI* aURL);
 
   // Internal methods.