diff --git a/lapce-ui/src/lib.rs b/lapce-ui/src/lib.rs
index 89f0354a..fe7d47ce 100644
--- a/lapce-ui/src/lib.rs
+++ b/lapce-ui/src/lib.rs
@@ -19,7 +19,6 @@
 pub mod scroll;
 pub mod search;
 pub mod settings;
-pub mod signature;
 pub mod source_control;
 pub mod split;
 pub mod status;
diff --git a/lapce-ui/src/signature.rs b/lapce-ui/src/signature.rs
deleted file mode 100644
index 5ccec727..00000000
--- a/lapce-ui/src/signature.rs
+++ /dev/null
@@ -1,65 +0,0 @@
-use lsp_types::ParameterLabel;
-use lsp_types::SignatureHelp;
-
-#[derive(Clone)]
-pub struct SignatureState {
-    pub offset: Option<usize>,
-    pub signature: Option<SignatureHelp>,
-    pub active: Option<(usize, usize)>,
-}
-
-impl SignatureState {
-    pub fn new() -> Self {
-        Self {
-            offset: None,
-            signature: None,
-            active: None,
-        }
-    }
-
-    pub fn update(&mut self, offset: usize, commas: Vec<usize>) -> Option<bool> {
-        let signature = self.signature.as_ref()?;
-        let params = signature.signatures[0].parameters.as_ref()?;
-        if params.is_empty() {
-            return None;
-        }
-        let mut index = commas.len();
-        for (i, c) in commas.iter().enumerate() {
-            if offset <= *c {
-                index = i;
-                break;
-            }
-        }
-
-        let label = signature.signatures[0].label.clone();
-        let active = if index >= params.len() {
-            None
-        } else {
-            match &params[index].label {
-                ParameterLabel::Simple(s) => {
-                    let start = label.find(s)?;
-                    Some((start, start + s.len()))
-                }
-                ParameterLabel::LabelOffsets(offsets) => {
-                    Some((offsets[0] as usize, offsets[1] as usize))
-                }
-            }
-        };
-
-        let changed = self.active != active;
-        self.active = active;
-        Some(changed)
-    }
-
-    pub fn clear(&mut self) {
-        self.offset = None;
-        self.signature = None;
-        self.active = None;
-    }
-}
-
-impl Default for SignatureState {
-    fn default() -> Self {
-        Self::new()
-    }
-}