remove `NoSendItem` and `NoSyncItem`
@@ -2377,10 +2377,6 @@ These types help drive the compiler's analysis
: ___Needs filling in___
* `no_copy_bound`
: This type does not implement "copy", even if eligible.
-* `no_send_bound`
- : This type does not implement "send", even if eligible.
-* `no_sync_bound`
- : This type does not implement "sync", even if eligible.
* `eh_personality`
: ___Needs filling in___
* `exchange_free`
