all: remove control center in its entirety

src/security_context_acceptor.rs

@@ -42,15 +42,6 @@ pub struct AcceptorMetadata {
     pub tag: Option<String>,
 }
 
-impl AcceptorMetadata {
-    pub fn secure() -> Self {
-        Self {
-            secure: true,
-            ..Default::default()
-        }
-    }
-}
-
 impl SecurityContextAcceptors {
     pub fn clear(&self) {
         for acceptor in self.acceptors.lock().drain_values() {