Clean up DoubleCheckedLocking docs ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=111966803
Clean up DoubleCheckedLocking docs
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=111966803

Anish2/error-prone,cushon/error-prone,google/error-prone,cushon/error-prone,cushon/error-prone,Anish2/error-prone,Anish2/error-prone,Anish2/error-prone,cushon/error-prone,google/error-prone