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96515ccc7a
Clean up outdated `use_once_payload` pretty printer comment While reading some parts of the pretty printer code, I noticed this old comment which seemed out of place. The `use_once_payload` this outdated comment mentions was removed in 2017 in 40f03a1e0d6702add1922f82d716d5b2c23a59f0, so this completes the work by removing the comment.
The driver crate is effectively the "main" function for the rust
compiler. It orchestrates the compilation process and "knits together"
the code from the other crates within rustc. This crate itself does
not contain any of the "main logic" of the compiler (though it does
have some code related to pretty printing or other minor compiler
options).
For more information about how the driver works, see the rustc dev guide.