Rollup merge of #25160 - michaelwu:remove-schedule_free_slice, r=cmr

Nothing uses it anymore.

src/librustc_trans/trans/cleanup.rs

@@ -507,23 +507,6 @@ impl<'blk, 'tcx> CleanupMethods<'blk, 'tcx> for FunctionContext<'blk, 'tcx> {
         self.schedule_clean(cleanup_scope, drop as CleanupObj);
     }
 
-    /// Schedules a call to `free(val)`. Note that this is a shallow operation.
-    fn schedule_free_slice(&self,
-                           cleanup_scope: ScopeId,
-                           val: ValueRef,
-                           size: ValueRef,
-                           align: ValueRef,
-                           heap: Heap) {
-        let drop = box FreeSlice { ptr: val, size: size, align: align, heap: heap };
-
-        debug!("schedule_free_slice({:?}, val={}, heap={:?})",
-               cleanup_scope,
-               self.ccx.tn().val_to_string(val),
-               heap);
-
-        self.schedule_clean(cleanup_scope, drop as CleanupObj);
-    }
-
     fn schedule_clean(&self,
                       cleanup_scope: ScopeId,
                       cleanup: CleanupObj<'tcx>) {
@@ -1106,43 +1089,6 @@ impl<'tcx> Cleanup<'tcx> for FreeValue<'tcx> {
     }
 }
 
-#[derive(Copy, Clone)]
-pub struct FreeSlice {
-    ptr: ValueRef,
-    size: ValueRef,
-    align: ValueRef,
-    heap: Heap,
-}
-
-impl<'tcx> Cleanup<'tcx> for FreeSlice {
-    fn must_unwind(&self) -> bool {
-        true
-    }
-
-    fn clean_on_unwind(&self) -> bool {
-        true
-    }
-
-    fn is_lifetime_end(&self) -> bool {
-        false
-    }
-
-    fn trans<'blk>(&self,
-                   bcx: Block<'blk, 'tcx>,
-                   debug_loc: DebugLoc)
-                   -> Block<'blk, 'tcx> {
-        match self.heap {
-            HeapExchange => {
-                glue::trans_exchange_free_dyn(bcx,
-                                              self.ptr,
-                                              self.size,
-                                              self.align,
-                                              debug_loc)
-            }
-        }
-    }
-}
-
 #[derive(Copy, Clone)]
 pub struct LifetimeEnd {
     ptr: ValueRef,
@@ -1253,12 +1199,6 @@ pub trait CleanupMethods<'blk, 'tcx> {
                            val: ValueRef,
                            heap: Heap,
                            content_ty: Ty<'tcx>);
-    fn schedule_free_slice(&self,
-                           cleanup_scope: ScopeId,
-                           val: ValueRef,
-                           size: ValueRef,
-                           align: ValueRef,
-                           heap: Heap);
     fn schedule_clean(&self,
                       cleanup_scope: ScopeId,
                       cleanup: CleanupObj<'tcx>);