feedback: Building from source

> <…>it clone --recursive https://github.com/tarantool/tarantool.git **|-b 2.2|** ~/tarantool
> 
> 
> On rare occasions, the submodules need to be upda<…>

https://www.tarantool.io/en/doc/2.5/dev_guide/building_from_source/

I would remove it. Default branch is `master` and it is quite intuitive for most developers.

(Don't forget to remove 'branch 2.2' above.)