Bug 1692830 - Remove redundant nullptr checks after new in nsWebBrowserPersist.cpp. r=smaug

Differential Revision: https://phabricator.services.mozilla.com/D105164

dom/webbrowserpersist/nsWebBrowserPersist.cpp

@@ -2283,10 +2283,6 @@ nsresult nsWebBrowserPersist::MakeOutputStreamFromFile(
   if (mPersistFlags & PERSIST_FLAGS_CLEANUP_ON_FAILURE) {
     // Add to cleanup list in event of failure
     auto* cleanupData = new CleanupData;
-    if (!cleanupData) {
-      NS_RELEASE(*aOutputStream);
-      return NS_ERROR_OUT_OF_MEMORY;
-    }
     cleanupData->mFile = aFile;
     cleanupData->mIsDirectory = false;
     if (NS_IsMainThread()) {
@@ -2724,7 +2720,6 @@ nsresult nsWebBrowserPersist::MakeAndStoreLocalFilenameInURIMap(
 
   // Store the file name
   data = new URIData;
-  NS_ENSURE_TRUE(data, NS_ERROR_OUT_OF_MEMORY);
 
   data->mContentPolicyType = aContentPolicyType;
   data->mNeedsPersisting = aNeedsPersisting;