rust-lang/rust — pull request #19763 by csouth3 (2014-12-12 02:18:16+00:00)
Title: Remove feature gate directives for `if_let`, `while_let`, and `tuple_indexing`.

This is a revival of #19517 (per request of @alexcrichton) now that the new snapshots have landed. We can now remove the last feature gates for if_let, while_let, and tuple_indexing scattered throughout the test sources since these features have been added to Rust.

Closes #19473.