refactor(treewide): get rid of compile time build environment introspection

It's cursed and not very useful. Still a few uses of ctor left, but oh well.

docs/reference/admin/debug.md

@@ -118,10 +118,6 @@ Print detailed tokio runtime metrics accumulated since last command invocation
 
 Print the current time
 
-## `!admin debug list-dependencies`
-
-List dependencies
-
 ## `!admin debug database-stats`
 
 Get database statistics

docs/reference/admin/server.md

@@ -16,10 +16,6 @@ Show configuration values
 
 Reload configuration values
 
-## `!admin server list-features`
-
-List the features built into the server
-
 ## `!admin server memory-usage`
 
 Print database memory usage statistics