L2P removal

Since L2P is no longer available, authentication currently fails if a user wants to authenticate via L2P. This also includes courses where users can be authenticated by either moodle or l2p, for example 15ss-ex4.

(!) This merge request is build upon !42 (merged) (approved, not merged). Merge !42 (merged) before.

templates/course.html

@@ -126,7 +126,6 @@
 						<option selected value="password">Passwort</option>
 						<option value="rwth">RWTH intern</option>
 						<option value="fsmpi">FSMPI intern</option>
-						<option value="l2p">L2P Lernraum</option>
 						<option value="moodle">Moodle Lernraum</option>
 						<option value="none">Kein Zugriff</option>
 					</select>