Revert "Enable OverrideDefaultOzonePlatformHintToAuto feature"

This reverts commit 15cf03d1d22ad6361bdc1f857edfdefeb6353a41.

Reason for revert:
LUCI Bisection has identified this change as the cause of a test failure. See the analysis: https://ci.chromium.org/ui/p/chromium/bisection/test-analysis/b/5649281403846656

Sample build with failed test: https://ci.chromium.org/b/8708948569686098849
Affected test(s):
[ninja://chrome/test:browser_tests/VariationsSafeModeEndToEndBrowserTest.ExtendedNullSeedEndToEnd/SeedFileExperimentGroups.0](https://ci.chromium.org/ui/test/chromium/ninja:%2F%2Fchrome%2Ftest:browser_tests%2FVariationsSafeModeEndToEndBrowserTest.ExtendedNullSeedEndToEnd%2FSeedFileExperimentGroups.0?q=VHash%3A940c3b1af87ec9b1)
[ninja://chrome/test:browser_tests/VariationsSafeModeEndToEndBrowserTest.ExtendedNullSeedEndToEnd/SeedFileExperimentGroups.1](https://ci.chromium.org/ui/test/chromium/ninja:%2F%2Fchrome%2Ftest:browser_tests%2FVariationsSafeModeEndToEndBrowserTest.ExtendedNullSeedEndToEnd%2FSeedFileExperimentGroups.1?q=VHash%3A940c3b1af87ec9b1)
[ninja://chrome/test:browser_tests/VariationsSafeModeEndToEndBrowserTest.ExtendedSafeSeedEndToEnd/SeedFileExperimentGroups.0](https://ci.chromium.org/ui/test/chromium/ninja:%2F%2Fchrome%2Ftest:browser_tests%2FVariationsSafeModeEndToEndBrowserTest.ExtendedSafeSeedEndToEnd%2FSeedFileExperimentGroups.0?q=VHash%3A940c3b1af87ec9b1)
[ninja://chrome/test:browser_tests/VariationsSafeModeEndToEndBrowserTest.ExtendedSafeSeedEndToEnd/SeedFileExperimentGroups.1](https://ci.chromium.org/ui/test/chromium/ninja:%2F%2Fchrome%2Ftest:browser_tests%2FVariationsSafeModeEndToEndBrowserTest.ExtendedSafeSeedEndToEnd%2FSeedFileExperimentGroups.1?q=VHash%3A940c3b1af87ec9b1)

If this is a false positive, please report it at http://b.corp.google.com/createIssue?component=1199205&description=Analysis%3A+https%3A%2F%2Fci.chromium.org%2Fui%2Fp%2Fchromium%2Fbisection%2Ftest-analysis%2Fb%2F5649281403846656&format=PLAIN&priority=P3&title=Wrongly+blamed+https%3A%2F%2Fchromium-review.googlesource.com%2Fc%2Fchromium%2Fsrc%2F%2B%2F6771245&type=BUG

Original change's description:
> Enable OverrideDefaultOzonePlatformHintToAuto feature
>
> This is required for cl/784605417 which fully launches the experiment.
>
> Change-Id: If722ab1b2a8f6b1004b4baf22834f8f026e8eb5c
> Bug: 40083534
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6771245
> Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
> Reviewed-by: Kramer Ge <fangzhoug@chromium.org>
> Reviewed-by: Nico Weber <thakis@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1489138}
>

Bug: 40083534
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I0c2ebc963a08ee723a3a0cdadbad2c05b3179a83
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6772226
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Luciano Pacheco <lucmult@chromium.org>
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1489340}