Remove a large amount of deprecated functionality

Spring cleaning is here! In the Fall! This commit removes quite a large amount
of deprecated functionality from the standard libraries. I tried to ensure that
only old deprecated functionality was removed.

This is removing lots and lots of deprecated features, so this is a breaking
change. Please consult the deprecation messages of the deleted code to see how
to migrate code forward if it still needs migration.

[breaking-change]

1 files changed, 0 insertions, 8 deletions

diff --git a/src/libserialize/json.rs b/src/libserialize/json.rs
index eda38e96cbb..73b4773fb3f 100644
--- a/src/libserialize/json.rs
+++ b/src/libserialize/json.rs
@@ -406,14 +406,6 @@ impl<'a> Encoder<'a> {
         }
         m.unwrap()
     }
-
-    /// Encode the specified struct into a json str
-    ///
-    /// Note: this function is deprecated. Consider using `json::encode` instead.
-    #[deprecated = "Replaced by `json::encode`"]
-    pub fn str_encode<T: Encodable<Encoder<'a>, io::IoError>>(object: &T) -> string::String {
-        encode(object)
-    }
 }
 
 impl<'a> ::Encoder<io::IoError> for Encoder<'a> {