Remove config_apache_wsgi mention

This has only ever appeared in
I3a5d1e511c5dca1e6d01a1adca8fda0a43d4f632 and has never been exported,
referenced, etc.

Remove it to avoid confusion
(e.g. Icfad40ee6998296727a95613199e5c2d87bd0a45)

Change-Id: Ic71e841f6f751ff43083e12ad734b9c84be7b645
diff --git a/lib/apache b/lib/apache
index c7d69f2..a8e9bc5 100644
--- a/lib/apache
+++ b/lib/apache
@@ -11,7 +11,6 @@
 # lib/apache exports the following functions:
 #
 # - install_apache_wsgi
-# - config_apache_wsgi
 # - apache_site_config_for
 # - enable_apache_site
 # - disable_apache_site