Remove MTS_DRAGONFLY_F411RE post binary hook that adds the bootloader

[felser]

Summary of changes

Removed the post binary hook for MTS_DRAGONFLY_F411RE that adds the bootloader to the application. Adding a bootloader will not be accomplished by specifying it in mbed_app.json. This allows any bootloader to be added.

Impact of changes

Migration actions required

Documentation

None

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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)
[] Covered by existing mbed-os tests (Greentea or Unittest)
[X] Tests / results supplied as part of this PR

Built blinky with the post binary hook removed. Tested with and without a bootloader specified in mbed_app.json. All bin files with and without the bootloader run on the target. Also loaded application only files using the bootloader ymodem method.

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Reviewers

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[ciarmcom]

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

[0xc0170]

CI started

[mbed-ci]

Test run: SUCCESS

Summary: 6 of 6 test jobs passed
Build number : 1
Build artifacts

[mergify]

This PR cannot be merged due to conflicts. Please rebase to resolve them.

[adbridge]

@felser looks like this needs a rebase ?

[felser]

I can if you think it's necessary. I'm only removing the section for the post binary hook. Not touching anything else. So the conflict is very easy to resolve. Is that something you can do... just remove the binary hook section?

[0xc0170]

@felser The pull request needs a rebase, it should be quick fix.

As this is touching only target.json, the change should be OK to go in (compare to #13135).

Pull request has been modified.

[mbed-ci]

Test run: SUCCESS

Summary: 6 of 6 test jobs passed
Build number : 2
Build artifacts