diff --git a/src/shell/element/stack.rs b/src/shell/element/stack.rs
index f8afecb0..6e198b6c 100644
--- a/src/shell/element/stack.rs
+++ b/src/shell/element/stack.rs
@@ -657,13 +657,6 @@ impl TabMessage for Message {
         Message::Activate(idx)
     }
 
-    fn is_activate(&self) -> Option<usize> {
-        match self {
-            Message::Activate(idx) => Some(*idx),
-            _ => None,
-        }
-    }
-
     fn scroll_back() -> Self {
         Message::ScrollBack
     }
diff --git a/src/shell/element/stack/tab.rs b/src/shell/element/stack/tab.rs
index 28dd49e4..7750820f 100644
--- a/src/shell/element/stack/tab.rs
+++ b/src/shell/element/stack/tab.rs
@@ -132,7 +132,6 @@ impl From<TabBackgroundTheme> for theme::Container {
 
 pub trait TabMessage: Clone {
     fn activate(idx: usize) -> Self;
-    fn is_activate(&self) -> Option<usize>;
 
     fn scroll_further() -> Self;
     fn scroll_back() -> Self;