Remove unused cortex-m-rt in panic-probe

[Dirbaio]

It's nice to not depend on a particular cortex-m-rt version, it'll help the 0.6 -> 0.7 breaking transition.

This shouldn't be a breaking change. Could we get a release of this as 0.2.1 to help with the transition? Thank you!

[jonas-schievink]

bors r+

[Urhengulas]

Could we get a release of this as 0.2.1 to help with the transition?

Although we said we want to avoid another 0.2.x release, I think we can do this, if it is beneficial. And maybe it is obvious, but how does it help with the transition? 😁

[Dirbaio]

how does it help with the transition?

You can't have two versions of cortex-m-rt in the crate tree at the same time, they conflict because they need to set globally-unique things like the linker script and interrupt vectors.

panic-probe pulling in cortex-m-rt 0.6 completely prevents users from using cortex-m-rt 0.7

[jonas-schievink]

bors r+

[bors]

Build succeeded:

• ci