Remove unnecessary Clone/Copy derives from analyses.

No analysis needs `Copy`, and `MaybeBorrowedLocals` is the only analysis
that needs `Clone`. In `locals_live_across_suspend_points` it gets
cloned so it can be used within a `MaybeRequiresStorage`.

Author: nnethercote

compiler/rustc_mir_dataflow/src/impls/borrowed_locals.rs

@@ -11,7 +11,7 @@ use crate::{AnalysisDomain, GenKill, GenKillAnalysis};
 /// At present, this is used as a very limited form of alias analysis. For example,
 /// `MaybeBorrowedLocals` is used to compute which locals are live during a yield expression for
 /// immovable coroutines.
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct MaybeBorrowedLocals;
 
 impl MaybeBorrowedLocals {

compiler/rustc_mir_dataflow/src/impls/liveness.rs

@@ -217,7 +217,6 @@ impl DefUse {
 /// This is basically written for dead store elimination and nothing else.
 ///
 /// All of the caveats of `MaybeLiveLocals` apply.
-#[derive(Clone, Copy)]
 pub struct MaybeTransitiveLiveLocals<'a> {
     always_live: &'a BitSet<Local>,
 }

compiler/rustc_mir_dataflow/src/impls/storage_liveness.rs

@@ -7,7 +7,6 @@ use rustc_middle::mir::*;
 use super::MaybeBorrowedLocals;
 use crate::{GenKill, ResultsCursor};
 
-#[derive(Clone)]
 pub struct MaybeStorageLive<'a> {
     always_live_locals: Cow<'a, BitSet<Local>>,
 }
@@ -80,7 +79,6 @@ impl<'tcx, 'a> crate::GenKillAnalysis<'tcx> for MaybeStorageLive<'a> {
     }
 }
 
-#[derive(Clone)]
 pub struct MaybeStorageDead<'a> {
     always_live_locals: Cow<'a, BitSet<Local>>,
 }