Revert "Adding page language to sync data."

This reverts commit 84466676ed06dc575bff5d10a5476493cb261667.

Reason for revert: Introduced flakiness to `sync_integration_tests`'s `SingleClientSessionsSyncTest.NavigationChainAlteredDestructively`.
https://analysis.chromium.org/p/chromium/flake-portal/analysis/culprit?key=ag9zfmZpbmRpdC1mb3ItbWVyQwsSDEZsYWtlQ3VscHJpdCIxY2hyb21pdW0vODQ0NjY2NzZlZDA2ZGM1NzViZmY1ZDEwYTU0NzY0OTNjYjI2MTY2Nww

Original change's description:
> Adding page language to sync data.
> 
> Bug: 957657
> Change-Id: I3e03e000c3c377fbf1417bf8a9a63e52d71af965
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1613789
> Commit-Queue: Alexandre Frechette <frechette@chromium.org>
> Reviewed-by: anthonyvd <anthonyvd@chromium.org>
> Reviewed-by: Mikel Astiz <mastiz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#662649}

TBR=anthonyvd@chromium.org,mastiz@chromium.org,frechette@chromium.org

Change-Id: If7c671ccd8912ab53169d1647c96c17319bd8fab
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 957657
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1627455
Reviewed-by: Alexandre Frechette <frechette@chromium.org>
Commit-Queue: Alexandre Frechette <frechette@chromium.org>
Cr-Commit-Position: refs/heads/master@{#662728}
18 files changed