diff --git a/poetry.lock b/poetry.lock
index 2ef18d4943e9792dfc2f8ac3feb968e23f7d91cc..69ee2118cf9609af3546cc7397f395b3a0d82b0a 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1646,11 +1646,6 @@ docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["pathlib2", "contextlib2", "unittest2"]
 
 [extras]
-app-alsijil = []
-app-chronos = []
-app-exlibris = []
-app-schild-nrw = []
-app-untis = []
 ldap = ["django-auth-ldap"]
 
 [metadata]