Fix clippy warnings.

src/fitter/recursive.rs

@@ -146,10 +146,10 @@ impl Fitter for RecursiveFitter {
             let k = self.p_p[i].dot(&self.h)
                 / (1.0 + self.xs[i] * self.h.dot(&self.p_p[i]).dot(&self.h));
 
-            let k = Array1::from(k);
+            // let k = Array1::from(k);
 
             self.m_f[i] =
-                &self.m_p[i] + &(&k * (&self.ns[i] - &self.xs[i] * &self.h.dot(&self.m_p[i])));
+                &self.m_p[i] + &(&k * (self.ns[i] - self.xs[i] * self.h.dot(&self.m_p[i])));
 
             // Covariance matrix is computed using the Joseph form.
             let outer = (self.xs[i] * &k)
@@ -274,7 +274,7 @@ impl Fitter for RecursiveFitter {
     }
 
     fn vs(&self, idx: usize) -> f64 {
-        *&self.vs[idx]
+        self.vs[idx]
     }
 
     fn vs_mut(&mut self, idx: usize) -> &mut f64 {
@@ -282,7 +282,7 @@ impl Fitter for RecursiveFitter {
     }
 
     fn ms(&self, idx: usize) -> f64 {
-        *&self.ms[idx]
+        self.ms[idx]
     }
 
     fn ms_mut(&mut self, idx: usize) -> &mut f64 {
@@ -290,7 +290,7 @@ impl Fitter for RecursiveFitter {
     }
 
     fn xs(&self, idx: usize) -> f64 {
-        *&self.xs[idx]
+        self.xs[idx]
     }
 
     fn xs_mut(&mut self, idx: usize) -> &mut f64 {
@@ -298,7 +298,7 @@ impl Fitter for RecursiveFitter {
     }
 
     fn ns(&self, idx: usize) -> f64 {
-        *&self.ns[idx]
+        self.ns[idx]
     }
 
     fn ns_mut(&mut self, idx: usize) -> &mut f64 {