Master checklist for deprecated language features to remove from the compiler

[bstrie]

Meta-bug. Let's clear out all this deprecated cruft before 1.0:

• argument modes De-mode libsyntax and librustc #4364 (linted off) (targeted for 0.7) DONE
• drop {} blocks Convert compiler to use Drop trait #3944 (linted off) DONE
• Inner mut on vectors Finish removing inner-vector-mutability #4912 DONE
• implicit self Remove non-explicit-self methods #4118 (linted off) DONE
• structural records Remove structural records from libcore, libstd, macros #4665 Remove structural records #3089 (linted off) DONE
• pure Remove pure #5384 DONE
• const as a mutability qualifier (targeted for 0.7)
• move Remove move and copy keywords #4339 DONE
• old-style function expressions Remove fn expressions #3677 DONE
• old-style operator overloading Remove old operator overloading #4205 DONE
• fail Replace all uses of fail with die!, then remove fail and rename die! to fail! #4524 DONE
• capture clauses Stop parsing capture clauses #4965 DONE
• assert Convert assert, log, fail to macros #3627 DONE
• log Convert assert, log, fail to macros #3627 DONE
• export Finish eliminating 'export' #3626 DONE
• newtype enums Remove newtype enums from the compiler #4966 DONE
• space-separated trait bounds Remove space-separated trait bounds #4967 DONE
• impl Foo : Trait DONE
• old region syntax DONE
• fn unsafe DONE
• ~mut DONE
• mutable fields (linted off) DONE
• Non-crate-relative imports DONE
• old-style bare functions DONE
• fn&, fn@, fn~ DONE
• space-separated trait bounds for trait inheritance DONE
• boxed traits without a sigil DONE
• old-style extern mod DONE
• copy DONE
• impl &Type and base types Remove impl &Type #5267 DONE
• overloaded op autoderef DONE
• static fn DONE
• old fixed-length vector syntax (waiting for snapshot) DONE
• convert const to static for all remaining purposes DONE
• ::<> in the type grammar DONE
• calling cross-crate private static methods DONE
• destructors referencing non-Owned data DONE
• nested enums DONE
• common fields DONE

[jdm]

error and debug

[catamorphism]

@pcwalton -- have we removed const and copy now?

[bstrie]

@TJC copy would be removed by #7753. The bug to remove const is #7700.

[alexcrichton]

Now that const has been removed, the entire checklist is complete!

This is actually really impressive.