Remove placeholder from aggregator module documentation.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3338 44740490-163a-0410-bde0-09ae8108e29a

modules/aggregator/docs/aggregator.txt

@@ -43,9 +43,6 @@ All of the global parameters can be overriden for each aggregator. Here is a lis
   * `saml2`
   * `shib13`
 
-`foo`
-: sldkfjdslkjf
-
 `reconstruct`
 : Whether simpleSAMLphp should regenerate the metadata XML (TRUE) or pass-through the input metadata XML (FALSE).