rustdoc: duplicated Sync in std::kinds

[nodakai]

• http://doc.rust-lang.org/std/kinds/

Traits

                <tr>
                    <td>Send</td>
                    <td class='docblock short'><p>Types able to be transferred across task boundaries.</p>

                <tr>
                    <td>Sized</td>
                    <td class='docblock short'><p>Types with a constant size known at compile-time.</p>

                <tr>
                    <td>Sync</td>
                    <td class='docblock short'><p>Types that can be safely shared between tasks when aliased.</p>

                <tr>
                    <td>Sync</td>
                    <td class='docblock short'><p>Types that can be safely shared between tasks when aliased.</p>

Copy	Types that can be copied by simply copying bits (i.e. memcpy).

I suspect if the below line has anything to do with this issue:

pub use self::Sync as Share;

Cf. eg. std::ascii which re-exports self::AsciiExt.

[sfackler]

Doesn't seem to be happening anymore.