minor #47 Remove framework.trusted_proxies option (ogizanagi)

This PR was merged into the master branch.

Discussion
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Remove framework.trusted_proxies option

As deprecated and "removed" in symfony/symfony#21830 and symfony/symfony#22238 (BC break)

Commits
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2507e41 Remove framework.trusted_proxies option

Author: fabpot

symfony/framework-bundle/3.3/etc/packages/framework.yaml

@@ -4,7 +4,6 @@ framework:
     #csrf_protection: null
     #http_method_override: true
     #trusted_hosts: null
-    #trusted_proxies: null
     # https://symfony.com/doc/current/reference/configuration/framework.html#handler-id
     #session:
     #    handler_id: session.handler.native_file