remove ENV/super.rb from homebrew-fork

this only has to do with building Formulae
remove metafiles.rb from homebrew-fork
remove compilers.rb from homebrew-fork
Merge pull request #8266 from rolandwalker/homebrew_remove_compilers

remove compilers.rb from homebrew-fork
Merge pull request #8265 from rolandwalker/homebrew_remove_metafiles

remove metafiles.rb from homebrew-fork
Merge pull request #8263 from rolandwalker/homebrew_remove_super

remove ENV/super.rb from homebrew-fork
strip various exception classes from homebrew-fork