Remove DropAndReplace terminator

PR 107844 made DropAndReplace unused, let's remove it completely
from the codebase.

compiler/rustc_mir_dataflow/src/framework/direction.rs

@@ -480,7 +480,6 @@ impl Direction for Forward {
 
             Assert { target, cleanup: unwind, expected: _, msg: _, cond: _ }
             | Drop { target, unwind, place: _ }
-            | DropAndReplace { target, unwind, value: _, place: _ }
             | FalseUnwind { real_target: target, unwind } => {
                 if let Some(unwind) = unwind {
                     propagate(unwind, exit_state);

compiler/rustc_mir_dataflow/src/impls/borrowed_locals.rs

@@ -111,8 +111,7 @@ where
         self.super_terminator(terminator, location);
 
         match terminator.kind {
-            mir::TerminatorKind::Drop { place: dropped_place, .. }
-            | mir::TerminatorKind::DropAndReplace { place: dropped_place, .. } => {
+            mir::TerminatorKind::Drop { place: dropped_place, .. } => {
                 // Drop terminators may call custom drop glue (`Drop::drop`), which takes `&mut
                 // self` as a parameter. In the general case, a drop impl could launder that
                 // reference into the surrounding environment through a raw pointer, thus creating

compiler/rustc_mir_dataflow/src/impls/storage_liveness.rs

@@ -202,7 +202,6 @@ impl<'mir, 'tcx> crate::GenKillAnalysis<'tcx> for MaybeRequiresStorage<'mir, 'tc
             TerminatorKind::Abort
             | TerminatorKind::Assert { .. }
             | TerminatorKind::Drop { .. }
-            | TerminatorKind::DropAndReplace { .. }
             | TerminatorKind::FalseEdge { .. }
             | TerminatorKind::FalseUnwind { .. }
             | TerminatorKind::GeneratorDrop
@@ -240,7 +239,6 @@ impl<'mir, 'tcx> crate::GenKillAnalysis<'tcx> for MaybeRequiresStorage<'mir, 'tc
             | TerminatorKind::Abort
             | TerminatorKind::Assert { .. }
             | TerminatorKind::Drop { .. }
-            | TerminatorKind::DropAndReplace { .. }
             | TerminatorKind::FalseEdge { .. }
             | TerminatorKind::FalseUnwind { .. }
             | TerminatorKind::GeneratorDrop

compiler/rustc_mir_dataflow/src/move_paths/builder.rs

@@ -392,11 +392,6 @@ impl<'b, 'a, 'tcx> Gatherer<'b, 'a, 'tcx> {
                 self.create_move_path(place);
                 self.gather_init(place.as_ref(), InitKind::Deep);
             }
-            TerminatorKind::DropAndReplace { place, ref value, .. } => {
-                self.create_move_path(place);
-                self.gather_operand(value);
-                self.gather_init(place.as_ref(), InitKind::Deep);
-            }
             TerminatorKind::Call {
                 ref func,
                 ref args,

compiler/rustc_mir_dataflow/src/value_analysis.rs

@@ -230,7 +230,7 @@ pub trait ValueAnalysis<'tcx> {
             TerminatorKind::Drop { place, .. } => {
                 state.flood_with(place.as_ref(), self.map(), Self::Value::bottom());
             }
-            TerminatorKind::DropAndReplace { .. } | TerminatorKind::Yield { .. } => {
+            TerminatorKind::Yield { .. } => {
                 // They would have an effect, but are not allowed in this phase.
                 bug!("encountered disallowed terminator");
             }