Remove Shift/Subst traits

3 files changed, 1 insertions, 15 deletions

diff --git a/dhall/src/semantics/phase/mod.rs b/dhall/src/semantics/phase/mod.rs
index 5d17338..6afed88 100644
--- a/dhall/src/semantics/phase/mod.rs
+++ b/dhall/src/semantics/phase/mod.rs
@@ -4,7 +4,6 @@ use std::path::Path;
 use crate::error::{EncodeError, Error, ImportError, TypeError};
 use crate::semantics::core::value::Value;
 use crate::semantics::core::value::ValueKind;
-use crate::semantics::core::var::{AlphaVar, Shift};
 use crate::semantics::to_expr::ToExprOptions;
 use crate::syntax::binary;
 use crate::syntax::{Builtin, Const, Expr};
@@ -191,18 +190,6 @@ impl Normalized {
     }
 }
 
-impl Shift for Typed {
-    fn shift(&self, delta: isize, var: &AlphaVar) -> Option<Self> {
-        Some(Typed(self.0.shift(delta, var)?))
-    }
-}
-
-impl Shift for Normalized {
-    fn shift(&self, delta: isize, var: &AlphaVar) -> Option<Self> {
-        Some(Normalized(self.0.shift(delta, var)?))
-    }
-}
-
 macro_rules! derive_traits_for_wrapper_struct {
     ($ty:ident) => {
         impl std::cmp::PartialEq for $ty {
diff --git a/dhall/src/semantics/phase/normalize.rs b/dhall/src/semantics/phase/normalize.rs
index 7b4b37f..615b2ff 100644
--- a/dhall/src/semantics/phase/normalize.rs
+++ b/dhall/src/semantics/phase/normalize.rs
@@ -3,7 +3,6 @@ use std::convert::TryInto;
 
 use crate::semantics::core::value::Value;
 use crate::semantics::core::value::ValueKind;
-use crate::semantics::core::var::Subst;
 use crate::semantics::phase::typecheck::{rc, typecheck};
 use crate::semantics::phase::Normalized;
 use crate::syntax;
diff --git a/dhall/src/semantics/phase/typecheck.rs b/dhall/src/semantics/phase/typecheck.rs
index 7e408eb..c77d9c4 100644
--- a/dhall/src/semantics/phase/typecheck.rs
+++ b/dhall/src/semantics/phase/typecheck.rs
@@ -6,7 +6,7 @@ use crate::error::{TypeError, TypeMessage};
 use crate::semantics::core::context::TyCtx;
 use crate::semantics::phase::normalize::merge_maps;
 use crate::semantics::phase::Normalized;
-use crate::semantics::{Binder, Shift, Subst, Value, ValueKind};
+use crate::semantics::{Binder, Value, ValueKind};
 use crate::syntax;
 use crate::syntax::{
     Builtin, Const, Expr, ExprKind, InterpolatedTextContents, Label, Span,