Remove the 'REFERENCED_FROM_ASM' variable attribute
Remove the 'REFERENCED_FROM_ASM' variable attribute

Remove the 'REFERENCED_FROM_ASM' variable attribute as it's never used.

Review URL: https://codereview.chromium.org/882733002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@189045 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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