Remove some residue, core is effectively de-exported now. Close #3583.

Author: graydon

src/libcore/core.rc

@@ -36,54 +36,12 @@ Implicitly, all crates behave as if they included the following prologue:
 // Don't link to core. We are core.
 #[no_core];
 
-//#[legacy_exports];
-
 #[warn(deprecated_mode)];
 #[warn(deprecated_pattern)];
 
 #[warn(vecs_implicitly_copyable)];
 #[deny(non_camel_case_types)];
 
-/*
-export int, i8, i16, i32, i64;
-export uint, u8, u16, u32, u64;
-export float, f32, f64;
-export box, char, str, ptr, vec, at_vec, bool;
-export either, option, result, iter;
-export gc, io, libc, os, run, rand, sys, cast, logging;
-export comm, task, future, pipes;
-export extfmt;
-// The test harness links against core, so don't include runtime in tests.
-// FIXME (#2861): Uncomment this after snapshot gets updated.
-//#[cfg(notest)]
-export rt;
-export tuple;
-export to_str, to_bytes;
-export from_str;
-export util;
-export dvec, dvec_iter;
-export dlist, dlist_iter;
-export send_map;
-export hash;
-export cmp;
-export num;
-export path;
-export mutable;
-export flate;
-export unit;
-export uniq;
-export repr;
-export cleanup;
-export reflect;
-
-// NDM seems to be necessary for resolve to work
-export option_iter;
-
-// This creates some APIs that I do not want to commit to, but it must be
-// exported from core in order for uv to remain in std (see #2648).
-export private;
-*/
-
 // Built-in-type support modules
 
 /// Operations and constants for `int`
@@ -252,10 +210,10 @@ pub mod extfmt;
 #[legacy_exports]
 pub mod rt;
 
-
-// For internal use, not exported
-
+// Ideally not exported, but currently is.
 pub mod private;
+
+// For internal use, not exported.
 mod unicode;
 mod cmath;
 mod stackwalk;