remove handleLoseFocus
remove handleLoseFocus

Test plan: none

Auditors: jack

learningequality/perseus,daukantas/perseus,chirilo/perseus,ariabuckles/perseus,ariabuckles/perseus,ariabuckles/perseus,ariabuckles/perseus,junyiacademy/perseus,daukantas/perseus,abe4mvp/perseus,iamchenxin/perseus,alexristich/perseus,iamchenxin/perseus,abe4mvp/perseus,huangins/perseus,alexristich/perseus,chirilo/perseus,huangins/perseus,sachgits/perseus,sachgits/perseus,learningequality/perseus,junyiacademy/perseus