Remove the trusted types requirement (#1495)

There seem to be breaking changes in Chrome that are causing this to
fail. We've weighed the risk of disabling the feature with the issues
we've encountered using it and decided to disable it for now.

server/eb/app.py

@@ -67,7 +67,6 @@ class WSGIServer(Server):
             "object-src": ["'none'"],
             "base-uri": ["'none'"],
             "frame-ancestors": ["'none'"],
-            "require-trusted-types-for": ["'script'"],
         }
 
         if not app.debug: