Update windows compilers

[h-vetinari]

Hey all

This feedstock is directly specifying vs2017_win-64 as a dependency,

example-robot-data-feedstock/recipe/meta.yaml

Lines 17 to 24 in 138b26a

	requirements:
	build:
	- python # [build_platform != target_platform]
	- cross-python_{{ target_platform }} # [build_platform != target_platform]
	- numpy # [build_platform != target_platform]
	- {{ compiler('cxx') }} # [not win]
	- vs2017_win-64 # [win64]
	- vs2017_win-32 # [win32]

but should just rely on the {{ compiler('c') }} function to provide the correct compilers on windows. In particular, conda-forge has moved on to vs2019 as the default compiler a while ago already, and doesn't support 32-bit builds anymore.

If you think you need vs2017, please let us know why (generally vs2019 and vs2022 should be fully compatible). If it's really necessary, please use the dedicated mechanism in conda_build_config.yaml for that, i.e.

c_compiler:     # [win]
  - vs2017      # [win]
cxx_compiler:   # [win]
  - vs2017      # [win]

as opposed to specifying it in meta.yaml directly

[jcarpent]

This is not needed at all. We can drop it indeed.

[jcarpent]

@jorisv Could you handle this?