diff --git a/src/observation.rs b/src/observation.rs
index a0e0fb5..11b3bda 100644
--- a/src/observation.rs
+++ b/src/observation.rs
@@ -32,7 +32,7 @@ pub(crate) struct Core {
     pub indices: Vec<usize>,
     pub ns_cav: Vec<f64>,
     pub xs_cav: Vec<f64>,
-    pub t: f64,
+    pub _t: f64,
     pub logpart: f64,
     pub exp_ll: f64,
 }
@@ -49,7 +49,7 @@ impl Core {
                 .collect(),
             ns_cav: (0..elems.len()).map(|_| 0.0).collect(),
             xs_cav: (0..elems.len()).map(|_| 0.0).collect(),
-            t,
+            _t: t,
             logpart: 0.0,
             exp_ll: 0.0,
         }
diff --git a/src/storage.rs b/src/storage.rs
index 09c7347..526848b 100644
--- a/src/storage.rs
+++ b/src/storage.rs
@@ -22,6 +22,7 @@ pub trait Storage {
 }
 */
 
+#[derive(Default)]
 pub struct Storage {
     keys: HashMap<String, usize>,
     items: Vec<Item>,
@@ -67,12 +68,3 @@ impl Storage {
         self.keys.keys()
     }
 }
-
-impl Default for Storage {
-    fn default() -> Self {
-        Self {
-            keys: HashMap::new(),
-            items: Vec::new(),
-        }
-    }
-}
diff --git a/src/utils.rs b/src/utils.rs
index a7a4834..3c675a9 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -88,6 +88,7 @@ pub fn logphi(z: f64) -> (f64, f64) {
     }
 }
 
+/*
 pub fn logsumexp2(xs: &[f64], bs: &[f64]) -> f64 {
     let a = xs.iter().max_by(|a, b| a.partial_cmp(b).unwrap()).unwrap();
 
@@ -98,6 +99,7 @@ pub fn logsumexp2(xs: &[f64], bs: &[f64]) -> f64 {
         .sum::<f64>()
         .ln()
 }
+*/
 
 pub const ROOTS_HERMITENORM_XS: [f64; 30] = [
     -9.706236,