diff --git a/cylc/sphinx_ext/cylc_lang/autodocumenters.py b/cylc/sphinx_ext/cylc_lang/autodocumenters.py
index 5b36cca..26639cf 100644
--- a/cylc/sphinx_ext/cylc_lang/autodocumenters.py
+++ b/cylc/sphinx_ext/cylc_lang/autodocumenters.py
@@ -38,7 +38,6 @@
 from cylc.flow.parsec.validate import ParsecValidator, CylcConfigValidator
 
 
-INDENT = '   '
 CYLC_CONF = 'cylc:conf'