rust: bssl-tls: Unstage wants_data

This function has been accidentally added from a list of deprecated functions.

Update-Note: If you happen to depend on this function, please use the
return value of do_handshake, sync_read, sync_write and peek instead.

Signed-off-by: Xiangfei Ding <xfding@google.com>
Change-Id: I43bd4f5a5ff4b2ddf166a28aca33b1b16a6a6964
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/101667
Reviewed-by: David Benjamin <davidben@google.com>

rust/bssl-tls/src/connection/lifecycle.rs

diff --git a/rust/bssl-tls/src/connection/lifecycle.rs b/rust/bssl-tls/src/connection/lifecycle.rs
index 6043267..aff6943 100644
--- a/rust/bssl-tls/src/connection/lifecycle.rs
+++ b/rust/bssl-tls/src/connection/lifecycle.rs
@@ -102,32 +102,6 @@
     }
 }
 
-bssl_macros::bssl_enum! {
-    /// TLS data-pending reasons
-    pub enum TlsPendingData: i32 {
-        /// TLS connection wants to read more data.
-        WantRead = bssl_sys::SSL_READING as i32,
-        /// TLS connection wants to write more data.
-        WantWrite = bssl_sys::SSL_WRITING as i32,
-    }
-}
-
-/// # Connection state
-///
-/// When operations on [`TlsConnection`] return with pending status,
-/// there will be reasons why the operations should be retried.
-impl<R, M> TlsConnection<R, M> {
-    /// Check the connection if it needs additional data.
-    pub fn wants_data(&self) -> Option<TlsPendingData> {
-        let code = unsafe {
-            // Safety: the validity of the handle is witnessed by `self`.
-            bssl_sys::SSL_want(self.ptr())
-        };
-        let code = i32::try_from(code).ok()?;
-        TlsPendingData::try_from(code).ok()
-    }
-}
-
 /// # Alerts
 impl<R, M> TlsConnection<R, M>
 where