Revert "Unified Side Panel: Add image search key/value to json struct."

This reverts commit dec15ed8f48265ad21bbd4ec4463a5e4c3372345.

Reason for revert: breaks on linux-chromeos-chrome, see https://ci.chromium.org/ui/p/chrome/builders/ci/linux-chromeos-chrome/24737/overview

Original change's description:
> Unified Side Panel: Add image search key/value to json struct.
>
> Added a new image search param to the json file and will use that to direct image search and region search requests to the unified side panel for search engines.
>
> Design Doc: go/unified-side-panel-non-google-dse
>
> - Direct 3P DSE requests to side panel only if the image search param exists and the unified side panel is turned on.
> - If the unified side panel flag is turned off, the 3P DSE requests are redirected to a new tab.
> - For lens requests, standardize the way rendering env variable query param gets added.
> - Use default vector image search icon for the 3P DSE's.
> - Changing Search Engine when side panel is opened closes side panel and  de-registers lens.
>
> For testing purposes, enabled side panel for Bing search engine and here are the demos:
>
> Region Search: https://drive.google.com/file/d/1wKde02oZL6EeFCJYwdPLfKo_p9qST-mE/view
>
> Image Search: https://drive.google.com/file/d/116hIj5fWda_hKZ_2VHa-L50gNWMsjAg9/view
>
> Changing Search Engine: https://drive.google.com/file/d/1lgO7yUV-pA6jpSXH6gZdFVT7-vGfqXh3/view
>
> NOTE: The existing browser tests for the lens unified side panel are broken, so did not add new browser tests for 3P DSE's, we will add them when fixing the browser tests in b/242909164.
>
> Bug: b/226186680
> Change-Id: I268eb7d673e02d6a0a77838280f1c7014367f314
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3866097
> Commit-Queue: Anudeep Palanki <apalanki@google.com>
> Reviewed-by: Ali Stanfield <stanfield@google.com>
> Reviewed-by: Evan Stade <estade@chromium.org>
> Reviewed-by: Orin Jaworski <orinj@chromium.org>
> Reviewed-by: Avi Drissman <avi@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1045182}

Bug: b/226186680
Change-Id: I2bb922204f51bdb012eb6c0be120f76e1029e8c2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3887281
Owners-Override: Dominique Fauteux-Chapleau <domfc@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Dominique Fauteux-Chapleau <domfc@google.com>
Auto-Submit: Dominique Fauteux-Chapleau <domfc@google.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1045241}
33 files changed
tree: a4eef3d36cc3518fb0874632bfa7b8f1616fc6eb
  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. weblayer/
  51. .clang-format
  52. .clang-tidy
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitattributes
  56. .gitignore
  57. .gn
  58. .mailmap
  59. .rustfmt.toml
  60. .vpython
  61. .vpython3
  62. .yapfignore
  63. AUTHORS
  64. BUILD.gn
  65. CODE_OF_CONDUCT.md
  66. codereview.settings
  67. DEPS
  68. DIR_METADATA
  69. ENG_REVIEW_OWNERS
  70. LICENSE
  71. LICENSE.chromium_os
  72. OWNERS
  73. PRESUBMIT.py
  74. PRESUBMIT_test.py
  75. PRESUBMIT_test_mocks.py
  76. README.md
  77. WATCHLISTS
README.md

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