manager: Remove legacy PoC manager web application

This has not been developed for years and as far as web applications
go it has some serious (security) issues.  So just remove it.

conf/Makefile.am

@@ -20,7 +20,6 @@ options = \
 	options/imcv.opt \
 	options/imv_policy_manager.opt \
 	options/iptfs.opt \
-	options/manager.opt \
 	options/medsrv.opt \
 	options/pki.opt \
 	options/pool.opt \

conf/options/manager.opt

@@ -1,18 +0,0 @@
-manager.database =
-	Credential database URI for manager. If it contains a password, make
-	sure to adjust the permissions of the config file accordingly.
-
-manager.debug = no
-	Enable debugging in manager.
-
-manager.load =
-	Plugins to load in manager.
-
-manager.socket =
-	FastCGI socket of manager, to run it statically.
-
-manager.threads = 10
-	Threads to use for request handling.
-
-manager.timeout = 15m
-	Session timeout for manager.