scancode: version >31.2.4 contains fix for reindexing

[0xc0170]

Summary of changes

The workaround is not needed anymore (v32 is breaking this reindexing as they created new command to do that anyway).

Impact of changes

Migration actions required

Documentation

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Pull request type

[x] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

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Test results

[] No Tests required for this change (E.g docs only update)
[x] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

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Reviewers

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[0xc0170]

This should fix the recent scancode breakage (appears starting from v32, details can be found https://github.com/nexB/scancode-toolkit/releases/tag/v32.0.0rc1, look for reindex)

[0xc0170]

CI started