[Settings] Remove override the transition to fade during the Suw flow.

Because Suw side has already override the transition when calling the
font size.

video: https://drive.google.com/file/d/1Lihpj3PFX4-xpg1d3pT3pBqm99noQL-k/view?usp=sharing

Bug: 208374725
Test: manual
Change-Id: Idaa56cdbdc7b9f76fe370ba79130007f7359557c