Remove caching of compilers

[isuruf]

These caches don't work usually because the version downloaded here is the newest while the feedstocks don't use the latest.

cc @h-vetinari

[jakirkham]

Seems reasonable. These were added as a convenience in the past. They don't actually need to be there (nothing in the images use them)

[h-vetinari]

Makes sense 👍

[hmaarrfk]

why not cache the default versions? isn't that "better"? we could also update the default compiler right?

[jakirkham]

Think the challenge we are running into is some CI jobs are running out of memory (particularly CUDA cross-compiled jobs). So cutting out these extra bits would help remove pressure for those jobs

Given feedstocks can (and sometimes do) deviate from the compiler version in conda-forge-pinning, we probably can't generally cache the right compiler version in all cases. As a result, dropping the cached compilers seem reasonable

Would add that when we added these it was before .conda and may have preceded CDN. So it was fairly helpful then. Now it doesn't really feel necessary

[hmaarrfk]

ok understood about the space

[jakirkham]

Hmm...seems that automerge label isn't doing anything

[jakirkham]

Thanks Isuru for the PR and everyone for the reviews! 🙏