Remove console warning as GCC 10 is supported

[jeromecoutant]

Summary of changes

Goal is to remove wrong console warning:

[Warning] @,: Compiler version mismatch: Have 10.3.1; expected version >= 9.0.0 and < 10.0.0

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

[x] No Tests required for this change (E.g docs only update)
[] 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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[ciarmcom]

@jeromecoutant, thank you for your changes.
@ARMmbed/mbed-os-maintainers please review.

[0xc0170]

the first should be also fixed to 10 (previously it was set to >9, <10, it should be now >10,<11

[0xc0170]

@saheerb Please review. I believe this was missed during the latest update to bump this to v10

Pull request has been modified.

[saheerb]

The change looks alright but breaks the CI. I think this/similar change was considered before and dropped later because of CI breakage. Tools team might remember.

[0xc0170]

I initially assumed this was missed as I could not remember details so I reached out for help.

We did not update the warning because of the online tools sharing the same code. We are not planning to update the online tools as they are frozen (it's quite a risk to update it at the moment, avoiding breakages).
We need to leave this as it is and close this pull request unfortunately.