all: remove control center in its entirety

src/ifs/head_management.rs

@@ -21,7 +21,7 @@ use {
         wire::JayHeadManagerSessionV1Id,
     },
     std::{
-        cell::{Cell, Ref, RefCell},
+        cell::{Cell, RefCell},
         collections::hash_map::Entry,
         rc::Rc,
     },
@@ -103,16 +103,6 @@ pub struct HeadState {
     pub persistent_state: Option<RcEq<PersistentOutputState>>,
 }
 
-pub struct ReadOnlyHeadState {
-    state: Rc<RefCell<HeadState>>,
-}
-
-impl ReadOnlyHeadState {
-    pub fn borrow(&self) -> Ref<'_, HeadState> {
-        self.state.borrow()
-    }
-}
-
 impl HeadState {
     pub fn update_in_compositor_space(&mut self, state: &State, wl_output: Option<GlobalName>) {
         self.in_compositor_space = false;
@@ -269,12 +259,6 @@ impl HeadManagers {
         }
     }
 
-    pub fn state(&self) -> ReadOnlyHeadState {
-        ReadOnlyHeadState {
-            state: self.state.clone(),
-        }
-    }
-
     pub fn handle_removed(&self) {
         for head in self.managers.lock().drain_values() {
             skip_in_transaction!(head);