cleaned up some mut

gem-remotes-esp32/src/dispatch.rs

@@ -49,7 +49,7 @@ impl Dispatch {
     }
 
     /// Get a channel sender that will send commands to this dispatcher
-    pub fn get_cmd_channel(&mut self) -> SendQ {
+    pub fn get_cmd_channel(&self) -> SendQ {
         self.endpoint.clone()
     }