Revert "Warn with ARMC6 and not v8m"

[kjbracey]

Description

A requested change from the toolchain guys, who are working on getting ARMC6 support online - the the misleading message "ARMC6 does not support ARM architecture v7" is winding them up.

Not clear we need any message at this point, at least on master. Maybe we will need something more specific about targets later, once we can pin down restrictions.

This reverts commit 3f68411.

Marked it as a "docs update", as it doesn't change the build result, just what the build prints. That probably doesn't make any sense.

Pull request type

[ ] Fix
[ ] Refactor
[ ] Target update
[ ] Functionality change
[X] Docs update
[ ] Test update
[ ] Breaking change

Reviewers

@theotherjimmy

[theotherjimmy]

Thanks. Looks good to me.

[kjbracey]

I think they would also quite like this backported to a 5.11.y so they can get a clean-looking build prior to official Mbed OS 5.12 release. I leave that open to debate - maybe with sufficient disclaimers elsewhere...

[0xc0170]

I think they would also quite like this backported to a 5.11.y so they can get a clean-looking build prior to official Mbed OS 5.12 release. I leave that open to debate - maybe with sufficient disclaimers elsewhere...

Fine with me

cc @bulislaw

[0xc0170]

If we can rebase, will fix travis

[cmonr]

NOTE: This PR has now been rebased.

If this was made in error, feel free to force-push your local branch to restore the PR.

[cmonr]

Marked for 5.12 for now. If ARMc6 support slips, past that RC, we'll need to re-enable the message.

I'm sure you've informed them that the main reason around the message is to help set user expectations as to what compilers are actively supported.

[cmonr]

SIGH

travis-ci/doxy-spellcheck failure is caused by something slipping in whilst the PR that enabled the job was making it's way through testing.

mbed-os master is broken (https://travis-ci.org/ARMmbed/mbed-os/jobs/480700843) and needs a fix to progress this PR. Hold tight.

[cmonr]

NOTE: This PR has now been rebased.

If this was made in error, feel free to force-push your local branch to restore the PR.

[0xc0170]

CI started

[mbed-ci]

Test run: SUCCESS

Summary: 11 of 11 test jobs passed
Build number : 1
Build artifacts