Replace StrAllocating.into_owned() with .into_string()

We already have into_string(), but it was implemented in terms of
into_owned(). Flip it around and deprecate into_owned().

Remove a few spurious calls to .into_owned() that existed in libregex
and librustdoc.

1 files changed, 0 insertions, 5 deletions

diff --git a/src/libstd/string.rs b/src/libstd/string.rs
index dce96cb2e8f..0edbaf99210 100644
--- a/src/libstd/string.rs
+++ b/src/libstd/string.rs
@@ -323,11 +323,6 @@ impl Str for String {
 
 impl StrAllocating for String {
     #[inline]
-    fn into_owned(self) -> String {
-        self
-    }
-
-    #[inline]
     fn into_string(self) -> String {
         self
     }