Remove conf files of plugins removed from libcharon-extra-plugins
These plugins were removed in version 5.8.0-2, and after upgrading to a
greater version an user might get confused since the conf files are
there but the plugins are not installed.
eap-dynamic might be quite useful for users because it allows clients to
select an alternative EAP method if the one selected by the server
initially is not supported.
eap-peap is still widely used by users because it is what most of the
clients implements. It is often used in combination with EAP-MSCHAPv2 to
authenticate e.g. WiFi clients (the TLS connection in EAP-PEAP protects
the potentially weak password authentication in EAP-MSCHAPv2). For
instance, using the same protocol for VPN clients allows reusing the
existing AAA infrastructure (AD/RADIUS server).
