Removing Garbage Collection From the Rust Language

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I've been floating ways to simplify the memory management story in Rust around the core team lately. Memory management is a contentious topic, since we've worked hard to get to the current state of things, and with the push toward stability lately, there is a (quite reasonable!) resistance to any changes at this state. Still, I think the current memory management story in Rust is worth revisiting, as the current state of things may cause us problems down the line. Working with Dave Herman and Niko Matsakis, I've formulated a fairly concrete proposal at this point. The basic idea is to remove garbage collection from the core language and relegate it to the standard library, with a minimal set of language hooks in place to allow for flexible, pluggable automatic memory management.