conmgr - Remove callback comment from conmgr_queue_write_data()

conmgr_queue_write_data() is now safe to call outside of callbacks.

Issue: 50189
diff --git a/src/conmgr/conmgr.h b/src/conmgr/conmgr.h
index 981767e..a582b46 100644
--- a/src/conmgr/conmgr.h
+++ b/src/conmgr/conmgr.h
@@ -426,7 +426,7 @@
 extern int conmgr_queue_send_fd(conmgr_fd_t *con, int fd);
 
 /*
- * Write binary data to connection (from callback).
+ * Write binary data to connection
  * NOTE: type=CON_TYPE_RAW only
  * IN con connection manager connection struct
  * IN buffer pointer to buffer