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This reverts commit 67f02bba.

Reason for revert: The new check breaks the android build on perf waterfall, e.g.: https://ci.chromium.org/p/chrome/builders/ci/android-builder-perf/240223

Original change's description:
> Android: Check R8 output for references to missing symbols
>
> javac prevents missing symbols via compiler errors, but they
> can still occur by including prebuilts with incomplete deps,
> or by using jar_excluded_patterns to remove a class that is
> actually used.
>
> Bug: 1142530
> Change-Id: Idebb28c9e1133d9021d899c570e35a5ff16d5f14
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2510236
> Commit-Queue: Andrew Grieve <agrieve@chromium.org>
> Reviewed-by: Peter Kotwicz <pkotwicz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#824739}

TBR=agrieve@chromium.org,pkotwicz@chromium.org

Change-Id: I20033723611ea07fcae98b7824402da89001dd8c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1142530
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2523395Reviewed-by: Wenbin Zhang <wenbinzhang@google.com>
Commit-Queue: Wenbin Zhang <wenbinzhang@google.com>
Cr-Commit-Position: refs/heads/master@{#824954}