Remove unused types from rustc::mir::interpret

The types are no longer used with the change to stacked borrows for
validation.

src/librustc/ich/impls_ty.rs

@@ -473,22 +473,6 @@ impl_stable_hash_for!(enum mir::interpret::InboundsCheck {
     MaybeDead
 });
 
-impl_stable_hash_for!(enum mir::interpret::Lock {
-    NoLock,
-    WriteLock(dl),
-    ReadLock(v)
-});
-
-impl_stable_hash_for!(struct mir::interpret::DynamicLifetime {
-    frame,
-    region
-});
-
-impl_stable_hash_for!(enum mir::interpret::AccessKind {
-    Read,
-    Write
-});
-
 impl_stable_hash_for!(enum ty::Variance {
     Covariant,
     Invariant,

src/librustc/mir/interpret/mod.rs

@@ -29,7 +29,6 @@ use mir;
 use hir::def_id::DefId;
 use ty::{self, TyCtxt, Instance};
 use ty::layout::{self, Size};
-use middle::region;
 use std::io;
 use rustc_serialize::{Encoder, Decodable, Encodable};
 use rustc_data_structures::fx::FxHashMap;
@@ -40,27 +39,6 @@ use ty::codec::TyDecoder;
 use std::sync::atomic::{AtomicU32, Ordering};
 use std::num::NonZeroU32;
 
-#[derive(Clone, Debug, PartialEq, Eq, Hash, RustcEncodable, RustcDecodable)]
-pub enum Lock {
-    NoLock,
-    WriteLock(DynamicLifetime),
-    /// This should never be empty -- that would be a read lock held and nobody
-    /// there to release it...
-    ReadLock(Vec<DynamicLifetime>),
-}
-
-#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash, RustcEncodable, RustcDecodable)]
-pub struct DynamicLifetime {
-    pub frame: usize,
-    pub region: Option<region::Scope>, // "None" indicates "until the function ends"
-}
-
-#[derive(Copy, Clone, Debug, PartialEq, Eq, RustcEncodable, RustcDecodable)]
-pub enum AccessKind {
-    Read,
-    Write,
-}
-
 /// Uniquely identifies a specific constant or static.
 #[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, RustcEncodable, RustcDecodable)]
 pub struct GlobalId<'tcx> {