Revert "Add new string to hint user of triple-tap shortcut delay"

This reverts commit dc156e77b4d88e9b378df4b8f4d3dfaa3607fbaa.

Reason for revert: New flow for magnification switch shortcut need to be fine-tuned again. Punt this flow to Android T, so revert the string.

Change-Id: Ieb48b8e3e34b96130193cf8499ff8f49e5954b1f
1 file changed