std: Internalize almost all of `std::rt`

This commit does some refactoring to make almost all of the `std::rt` private.
Specifically, the following items are no longer part of its API:

* DEFAULT_ERROR_CODE
* backtrace
* unwind
* args
* at_exit
* cleanup
* heap (this is just alloc::heap)
* min_stack
* util

The module is now tagged as `#[doc(hidden)]` as the only purpose it's serve is
an entry point for the `panic!` macro via the `begin_unwind` and
`begin_unwind_fmt` reexports.

1 files changed, 5 insertions, 8 deletions

diff --git a/src/libstd/collections/hash/table.rs b/src/libstd/collections/hash/table.rs
index e3601f1349c..f8bd791f681 100644
--- a/src/libstd/collections/hash/table.rs
+++ b/src/libstd/collections/hash/table.rs
@@ -8,23 +8,20 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use self::BucketState::*;
+use alloc::heap::{allocate, deallocate, EMPTY};
 
-use clone::Clone;
 use cmp;
 use hash::{Hash, Hasher};
-use iter::{Iterator, ExactSizeIterator};
-use marker::{Copy, Send, Sync, Sized, self};
+use marker;
 use mem::{align_of, size_of};
 use mem;
 use num::wrapping::OverflowingOps;
-use ops::{Deref, DerefMut, Drop};
-use option::Option;
-use option::Option::{Some, None};
+use ops::{Deref, DerefMut};
 use ptr::{self, Unique};
-use rt::heap::{allocate, deallocate, EMPTY};
 use collections::hash_state::HashState;
 
+use self::BucketState::*;
+
 const EMPTY_BUCKET: u64 = 0;
 
 /// The raw hashtable, providing safe-ish access to the unzipped and highly