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This reverts commit 81e8107c.

Reason for revert: This CL is likely the cause for the build failure with test PrintBackendCupsHelperTest.TestPpdParsingResolutionNoResolution since https://ci.chromium.org/p/chromium/builders/ci/Linux%20MSan%20Tests/25158

Original change's description:
> Add Linux support for printer resolutions
> 
> Add Linux support for PPD resolution options.
> 
> Test: ./printing_unittests
> Change-Id: I15d2245567e37938633c72daa2edc66cfa6f4b22
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2360472
> Commit-Queue: Pranav Batra <batrapranav@chromium.org>
> Reviewed-by: Daniel Hosseinian <dhoss@chromium.org>
> Reviewed-by: Lei Zhang <thestig@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#800424}

TBR=thestig@chromium.org,dhoss@chromium.org,batrapranav@chromium.org

Change-Id: I77598a213e4af7ff5a47ba815350ba907ea4631a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2368656Reviewed-by: Maggie Cai <mxcai@chromium.org>
Commit-Queue: Maggie Cai <mxcai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800507}