Remove flag com.android.launcher3.enable_taskbar_ui_thread from trunk_staging.

This change was automatically created by rolling back a Gantry workflow.

Bug: 404636836
Flag: com.android.launcher3.enable_taskbar_ui_thread
Ignore-AOSP-First: Flag change added internally for future AOSP release
Change-Id: I9a79781ecd68bf1adc5c27183f3e57787106534c
1 file changed