Delete ConstDebugInfo pass

compiler/rustc_mir_transform/src/lib.rs

@@ -55,7 +55,6 @@ mod remove_place_mention;
 // This pass is public to allow external drivers to perform MIR cleanup
 mod add_subtyping_projections;
 pub mod cleanup_post_borrowck;
-mod const_debuginfo;
 mod copy_prop;
 mod coroutine;
 mod cost_checker;
@@ -595,7 +594,6 @@ fn run_optimization_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
             &simplify::SimplifyLocals::AfterGVN,
             &dataflow_const_prop::DataflowConstProp,
             &single_use_consts::SingleUseConsts,
-            &const_debuginfo::ConstDebugInfo,
             &o1(simplify_branches::SimplifyConstCondition::AfterConstProp),
             &jump_threading::JumpThreading,
             &early_otherwise_branch::EarlyOtherwiseBranch,