Remove checks for unused keys in Transaction deserialization (uplift to 0.71.x)

[brave-builds]

Uplift of #3917
Fixes brave/brave-browser#6745

Approved, please ensure that before merging:

• You have checked CI and the builds, lint, and tests all pass or are not related to your PR.
• You have tested your change on Nightly.
• The PR milestones match the branch they are landing to.

After you merge:

• The associated issue milestone is set to the smallest version that the changes is landed on.

[kjozwiak]

Restarting macOS due to https://ci.brave.com/job/brave-browser-build-pr/job/pr3917_issue-6745-transactions-reset-after-restart_0.71.x/1/execution/node/580/log/.

Restarting Win x64 due to the following failure as per https://ci.brave.com/job/brave-browser-build-pr/job/pr3917_issue-6745-transactions-reset-after-restart_0.71.x/1/execution/node/357/log/:

15:13:49  Retrying 1 test (retry #0)
15:13:49  [ RUN      ] InstallDetailsTest.VersionMismatch
15:13:49  
15:13:49  ../../brave/chromium_src/chrome/install_static/brave_install_details_unittest.cc(82): error: Value of: FakeInstallDetails().VersionMismatch()
15:13:49  
15:13:49    Actual: true
15:13:49  
15:13:49  Expected: false
15:13:49  
15:13:49  Stack trace:
15:13:49  
15:13:49  Backtrace:
15:13:49  
15:13:49  	testing::internal::AssertHelper::operator= [0x00007FF6D9E87DEC+136] (C:\71.x\src\third_party\googletest\src\googletest\src\gtest.cc:404)
15:13:49  
15:13:49  	install_static::InstallDetailsTest_VersionMismatch_Test::TestBody [0x00007FF6D9E5F4FB+245] (C:\71.x\src\brave\chromium_src\chrome\install_static\brave_install_details_unittest.cc:82)
15:13:49  
15:13:49  
15:13:49  
15:13:49  [  FAILED  ] InstallDetailsTest.VersionMismatch (38 ms)
15:13:49  
15:13:49  [195/195] InstallDetailsTest.VersionMismatch (38 ms)
15:13:49  1 test failed:
15:13:49      InstallDetailsTest.VersionMismatch (../../brave/chromium_src/chrome/install_static/brave_install_details_unittest.cc:80)
15:13:49  Tests took 0 seconds.
15:13:49  null
15:13:49  powershell.exe : null
15:13:49  At C:\71.x@tmp\durable-45b263e6\powershellWrapper.ps1:3 char:1
15:13:49  + & powershell -NoProfile -NonInteractive -ExecutionPolicy Bypass -Comm ...
15:13:49  + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
15:13:49      + CategoryInfo          : NotSpecified: (null:String) [], RemoteException
15:13:49      + FullyQualifiedErrorId : NativeCommandError

[bsclifton]

CI on macOS looks good 👍 (it's finishing create_dist right now)
https://ci.brave.com/job/brave-core-build-pr/job/PR-3937/2/

CI on Windows got disconnected though, during init
https://ci.brave.com/job/brave-browser-build-pr/job/pr3917_issue-6745-transactions-reset-after-restart_0.71.x/2/execution/node/269/log/

Going to restart for Windows only...
https://ci.brave.com/job/brave-browser-build-pr/job/pr3917_issue-6745-transactions-reset-after-restart_0.71.x/3/console

[bsclifton]

++