Dead link for the blue pill support crate

[gbip]

Hello !
The blue pill support crate redirect to the stm32f103 hal.

[therealprof]

@gbip Why is that a problem and how would you like to see it addressed?

[gbip]

I think that this is misdirecting because one would expect the link to send us to a board support crate, while it is sending us to an hal implementation. Maybe we should remove it from this category ?

[therealprof]

I think @japaric idea here was that there's actually very little blue-pill specific in that crate that is not in the hal itself (because there's very little on the blue-pill board) so the hal can really take over the role of a board specific crate. I stumbled over the exact same redirect a while back but was not aware that this might be confusing.

@japaric Would it be okay for you if we removed the BSP crate from the list?

[irwineffect]

I agree the link should be removed. While a BSP crate for the blue pill would be pretty minimal and not much on top of the HAL, japaric/stm32f103xx-hal is still not a BSP.

[jonas-schievink]

This can probably be closed now that #146 has been merged