Revert "Add flag for Tiny Taskbar"

This reverts commit 1a57e08d8492d0901a7cee5c976a120df616b026.

Reason for revert: ag/27470277 flag instead
Flag: com.android.wm.shell.enable_tiny_taskbar
Test: None
Bug: 341784466

Change-Id: I1a36c66eabb9c2ddac4595cec6836da222182351
1 file changed