Remove "XSLT" runtime enabled feature

The flag was introduced at to run
an experiment to disable the feature, but it was more than 5 years ago.
Remove the flag as there seems no activity around it.

Bug: None
Change-Id: I186e804da25138455eef4ca8a66812ff40fb7e29
Reviewed-by: Kentaro Hara <>
Reviewed-by: Kinuko Yasuda <>
Commit-Queue: Yutaka Hirano <>
Cr-Commit-Position: refs/heads/master@{#653117}
17 files changed