Revert "Roll ICU to 172d33141"

This reverts commit 230693524f30b43a7ab418ef8106dc3a566701a7.

Reason for revert:

Consistent failures on Win7 Tests (1) [18 out of the last 18 builds have failed].

external/wpt/html/dom/documents/resource-metadata-management/document-lastModified-01.html

https://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=external%2Fwpt%2Fhtml%2Fdom%2Fdocuments%2Fresource-metadata-management%2Fdocument-lastModified-01.html&testType=webkit_layout_tests

e.g.
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Win7%20Tests%20%281%29/80749


Original change's description:
> Roll ICU to 172d33141
> 
> This roll has just one change to fix the timezone
> detection on Japanese/Korean and other non-English
> Windows.
> 
>   https://chromium-review.googlesource.com/1094322
> 
> [email protected]
> 
> Bug: 849724
> Test: Set the timezone to Tokyo on Japanese Windows
> Test: In JS console, 'new Date()' outputs 'Japan Standard Time' in parens.
> Change-Id: I0bddf33e1490b2b795504002d975252347e9d568
> Reviewed-on: https://chromium-review.googlesource.com/1094327
> Reviewed-by: Jungshik Shin <[email protected]>
> Commit-Queue: Jungshik Shin <[email protected]>
> Cr-Commit-Position: refs/heads/master@{#565906}

[email protected],[email protected]

Change-Id: I4b9e37bbe93fea628e2d2a94eabd3d983d9b551d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 849724
Reviewed-on: https://chromium-review.googlesource.com/1094856
Reviewed-by: Hayato Ito <[email protected]>
Commit-Queue: Hayato Ito <[email protected]>
Cr-Commit-Position: refs/heads/master@{#565931}
1 file changed