We have two remaining pieces of accessibility-based cleanup work, targeting M72.

1) Remove label for profile photo shown on password screen (i.e. empty alt text) 
https://screenshot.googleplex.com/CVrkcVsLxZ8.png

2) Clean up redundancy in alt text for per-feature toggles in Chrome OS Settings
https://screenshot.googleplex.com/JbmTAejtGah.png

For #2, Laura recommended we meet with dtseng@ to determine best practices here.