README.md was corrected

Artur Zakirov · Artur Zakirov · commit f89418a13c9e · 2016-02-12T13:34:16.000+03:00
diff --git a/README.md b/README.md
@@ -40,9 +40,6 @@ the config file (or update the current values)
     # libraries to load
     shared_preload_libraries = 'shared_ispell'
 
-    # known GUC prefixes
-    custom_variable_classes = 'shared_ispell'
-
     # config of the shared memory
     shared_ispell.max_size = 32MB
 
