Don't copy bytecode files into the incr. comp. cache.

It's no longer necessary now that bitcode is embedded into object files.

This change meant that `WorkProductFileKind::Bytecode` is no longer
necessary, which means that type is no longer necessary, which allowed
several places in the code to become simpler.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/librustc_middle/dep_graph/mod.rs b/src/librustc_middle/dep_graph/mod.rs
index 4786426792c..ef97f457c19 100644
--- a/src/librustc_middle/dep_graph/mod.rs
+++ b/src/librustc_middle/dep_graph/mod.rs
@@ -12,7 +12,7 @@ mod dep_node;
 pub(crate) use rustc_query_system::dep_graph::DepNodeParams;
 pub use rustc_query_system::dep_graph::{
     debug, hash_result, DepContext, DepNodeColor, DepNodeIndex, SerializedDepNodeIndex,
-    WorkProduct, WorkProductFileKind, WorkProductId,
+    WorkProduct, WorkProductId,
 };
 
 pub use dep_node::{label_strs, DepConstructor, DepKind, DepNode, DepNodeExt};