fix(connlib): remove outdated assertion due to possibility of network changes (#4222)

found while working on #4163

rust/connlib/snownet/src/allocation.rs

@@ -961,12 +961,9 @@ impl ChannelBindings {
     }
 
     fn handle_failed_binding(&mut self, c: u16) {
-        let Some(channel) = self.inner.remove(&c) else {
+        if self.inner.remove(&c).is_none() {
             debug_assert!(false, "No channel binding for {c}");
-            return;
-        };
-
-        debug_assert!(!channel.bound, "Channel should not yet be bound")
+        }
     }
 
     fn set_confirmed(&mut self, c: u16, now: Instant) -> bool {