[Gardener] Revert "Add HistoryEmbeddings to fieldtrial_testing_config.json"

This reverts commit 2d674f95cce0d40952f3933ff7a9802938f158c1.

Reason for revert: Causes HistoryTest.Metrics to fail on multiple
builders.

First failure on Win10 Tests x64:
https://ci.chromium.org/ui/p/chromium/builders/ci/Win10%20Tests%20x64/90291/test-results?sortby=&groupby=

Original change's description:
> Add HistoryEmbeddings to fieldtrial_testing_config.json
>
> Needed to support any Variations configuration.
>
> This CL also fixes a tab helper crash that shows up when the flag is
> default enabled in all tests.
>
> This also avoids constructing the service for ephemeral and kiosk mode
> profiles.
>
> Bug: b/338245900
> Change-Id: Ie6a0f923bc5432762cdae3675a55cdccf725d028
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5506718
> Reviewed-by: manuk hovanesian <manukh@chromium.org>
> Commit-Queue: Tommy Li <tommycli@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1295804}

Bug: b/338245900
Change-Id: Ib17be8b92c5b9daad88c9c315462c3411247475f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5514223
Owners-Override: Michelle Chen <michellegc@google.com>
Commit-Queue: Michelle Chen <michellegc@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1295929}
7 files changed
tree: 86ef289fc7825300e47a7c64dca2406768ddecd9
  1. android_webview/
  2. apps/
  3. ash/
  4. base/
  5. build/
  6. build_overrides/
  7. buildtools/
  8. cc/
  9. chrome/
  10. chromecast/
  11. chromeos/
  12. codelabs/
  13. components/
  14. content/
  15. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia_web/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. media/
  31. mojo/
  32. native_client_sdk/
  33. net/
  34. pdf/
  35. ppapi/
  36. printing/
  37. remoting/
  38. rlz/
  39. sandbox/
  40. services/
  41. skia/
  42. sql/
  43. storage/
  44. styleguide/
  45. testing/
  46. third_party/
  47. tools/
  48. ui/
  49. url/
  50. webkit/
  51. .clang-format
  52. .clang-tidy
  53. .clangd
  54. .eslintrc.js
  55. .git-blame-ignore-revs
  56. .gitallowed
  57. .gitattributes
  58. .gitignore
  59. .gitmodules
  60. .gn
  61. .mailmap
  62. .rustfmt.toml
  63. .vpython3
  64. .yapfignore
  65. ATL_OWNERS
  66. AUTHORS
  67. BUILD.gn
  68. CODE_OF_CONDUCT.md
  69. codereview.settings
  70. CPPLINT.cfg
  71. DEPS
  72. DIR_METADATA
  73. LICENSE
  74. LICENSE.chromium_os
  75. OWNERS
  76. PRESUBMIT.py
  77. PRESUBMIT_test.py
  78. PRESUBMIT_test_mocks.py
  79. README.md
  80. WATCHLISTS
README.md

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