Remove documentation of bug icons to report attention set issues
Remove documentation of bug icons to report attention set issues

Those bug icons have been removed by change I41da51a4f.

Signed-off-by: Edwin Kempin <d43fb6c98c97e553b671ed9a9318100f1de386e7@google.com>
Change-Id: I3a874fb62afcc660b3cac607dcaae2b5be473d3b

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