clean up some warnings

Author: programmerjake

src/array2d.rs

@@ -70,7 +70,7 @@ impl<'a, T: Sized> Array2DData for &'a [T] {
         Iter {
             positions: this.positions(),
             stride: this.stride(),
-            data: this.data.borrow(),
+            data: this.data,
         }
     }
 }

src/polynomial/div_rem.rs

@@ -244,11 +244,11 @@ impl<'l, 'r, T: PolynomialCoefficient + for<'a> ExactDiv<&'a T, Output = T>>
 {
     type Output = Polynomial<T>;
     fn exact_div(self, rhs: &Polynomial<T>) -> Polynomial<T> {
-        let (quotient, factor) = self.clone().exact_pseudo_div(rhs.borrow());
+        let (quotient, factor) = self.clone().exact_pseudo_div(rhs);
         quotient.exact_div(factor)
     }
     fn checked_exact_div(self, rhs: &Polynomial<T>) -> Option<Polynomial<T>> {
-        let (quotient, factor) = self.clone().checked_exact_pseudo_div(rhs.borrow())?;
+        let (quotient, factor) = self.clone().checked_exact_pseudo_div(rhs)?;
         quotient.checked_exact_div(factor)
     }
 }

src/util.rs

@@ -934,7 +934,7 @@ pub(crate) trait PrintTree: for<'a> PrintTreeData<'a> {
         &'a self,
     ) -> LeafOrNodePair<
         <Self as PrintTreeData<'a>>::Leaf,
-        &Self,
+        &'a Self,
         <Self as PrintTreeData<'a>>::NodeData,
     >;
     fn write_or_print_tree<WriteLnFn: FnMut(fmt::Arguments) -> Result<(), E>, E>(