remove stale comment

Author: wen-2018

bedrock/settings/__init__.py

@@ -87,7 +87,7 @@
     CSP_ASSETS_HOST,
     "data:",
     "blog.mozilla.org",  # For careers pages.
-    "www.mozilla.org",  # For release notes.
+    "www.mozilla.org",
     "www.googletagmanager.com",
     "www.google-analytics.com",
     "images.ctfassets.net",