std: Remove deprecated/unstable num functionality

This commit removes all the old casting/generic traits from `std::num` that are
no longer in use by the standard library. This additionally removes the old
`strconv` module which has not seen much use in quite a long time. All generic
functionality has been supplanted with traits in the `num` crate and the
`strconv` module is supplanted with the [rust-strconv crate][rust-strconv].

[rust-strconv]: https://github.com/lifthrasiir/rust-strconv

This is a breaking change due to the removal of these deprecated crates, and the
alternative crates are listed above.

[breaking-change]

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstd/path.rs b/src/libstd/path.rs
index d516599cf5f..1148c7bc3cf 100644
--- a/src/libstd/path.rs
+++ b/src/libstd/path.rs
@@ -110,7 +110,7 @@ use string::String;
 use vec::Vec;
 use fmt;
 
-use ffi::{OsStr, OsString, AsOsStr};
+use ffi::{OsStr, OsString};
 
 use self::platform::{is_sep_byte, is_verbatim_sep, MAIN_SEP_STR, parse_prefix};