remove some deref_finder uses

elaborate drops and inline don't seem to actually need it

Author: beepster4096

compiler/rustc_mir_transform/src/elaborate_drops.rs

@@ -14,7 +14,6 @@ use rustc_mir_dataflow::{
 use rustc_span::Span;
 use tracing::{debug, instrument};
 
-use crate::deref_separator::deref_finder;
 use crate::elaborate_drop::{DropElaborator, DropFlagMode, DropStyle, Unwind, elaborate_drop};
 use crate::patch::MirPatch;
 
@@ -87,7 +86,6 @@ impl<'tcx> crate::MirPass<'tcx> for ElaborateDrops {
             .elaborate()
         };
         elaborate_patch.apply(body);
-        deref_finder(tcx, body, true);
     }
 
     fn is_required(&self) -> bool {

compiler/rustc_mir_transform/src/inline.rs

@@ -20,7 +20,6 @@ use rustc_span::source_map::Spanned;
 use tracing::{debug, instrument, trace, trace_span};
 
 use crate::cost_checker::{CostChecker, is_call_like};
-use crate::deref_separator::deref_finder;
 use crate::simplify::{UsedInStmtLocals, simplify_cfg};
 use crate::validate::validate_types;
 use crate::{check_inline, util};
@@ -64,7 +63,6 @@ impl<'tcx> crate::MirPass<'tcx> for Inline {
         if inline::<NormalInliner<'tcx>>(tcx, body) {
             debug!("running simplify cfg on {:?}", body.source);
             simplify_cfg(tcx, body);
-            deref_finder(tcx, body, false);
         }
     }
 
@@ -100,7 +98,6 @@ impl<'tcx> crate::MirPass<'tcx> for ForceInline {
         if inline::<ForceInliner<'tcx>>(tcx, body) {
             debug!("running simplify cfg on {:?}", body.source);
             simplify_cfg(tcx, body);
-            deref_finder(tcx, body, false);
         }
     }
 }