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kotlinlang

Pretty sure `@BuilderInference` is useless nowadays, although for some reason it hasn't been deprecated yet? Should we remove it to clean up the codebase a bit?

wasn't it implicit from 1.7 onwards? So it would have still been useful for pre-1.7 compilers to know to apply builder inference but does arrow still support pre-1.7 compilers?

The other questions are does it hurt to leave it in the codebase? If it's kept should it be used consistently and added to new applicable DSLs? Are we certain there'd be no source-compat issues removing it?