Remove explicit negative Send and Sync impls #7
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Rc and Weak are already not Send and Sync because RcBox includes Cell and RefCell members. Remove the negative trait impls which allows removing the nightly feature optin_builtin_traits. Add doctests to ensure that Rc and Weak are !Send and !Sync.
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This change needs to be reverted because |
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Rc and Weak are already not Send and Sync because RcBox includes Cell
and RefCell members.
Remove the negative trait impls which allows removing the nightly feature
optin_builtin_traits. Add doctests to ensure that Rc and Weak are !Send
and !Sync.