diff --git a/components/style/element_state.rs b/components/style/element_state.rs
index 0852b4574fa..853d4039b2a 100644
--- a/components/style/element_state.rs
+++ b/components/style/element_state.rs
@@ -132,8 +132,6 @@ bitflags! {
         const IN_MOZINERT_STATE = 1 << 54;
         /// State for the topmost dialog element in top layer
         const IN_TOPMOST_MODAL_DIALOG_STATE = 1 << 55;
-        /// Non-standard & undocumented.
-        const IN_HANDLER_NOPLUGINS = 1 << 56;
     }
 }