remove unnecessary doc links

src/ast/expr.rs

@@ -3,7 +3,7 @@
 use super::val;
 use super::val::{Val, TypeError};
 
-/// An `Expr` is any construct that can be resolved to a [`Val`](super::val::Val).
+/// An `Expr` is any construct that can be resolved to a [`Val`].
 /// It is always pure, meaning there is no internal state and it will always evaluate to
 /// the same result no matter how often it is called.
 pub trait Expr {

src/ast/val.rs

@@ -2,7 +2,7 @@
 
 use std::fmt;
 
-/// Any primitive data type a [`Val`](Val) can hold.
+/// Any primitive data type a [`Val`] can hold.
 pub enum Type {
     Bool,
     Int,
@@ -28,7 +28,7 @@ pub trait Val {
     }
 }
 
-/// The actual data structure behind [`Val`](Val)
+/// The actual data structure behind [`Val`].
 struct Data<T: Clone> {
     data: T,
 }