updates: Remove an obsolete todo

We don't need a function for mapping pos.  This is done via
PieceRenderInstructions etc.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/src/updates.rs b/src/updates.rs
index 95f98057551830615db976b357b66f3bb04e27aa..bc14b6ea15dc70028197072b3a257e0771326d76 100644 (file)
--- a/src/updates.rs
+++ b/src/updates.rs
@@ -462,7 +462,6 @@ impl<NS,ZC> PieceUpdateOp<NS,ZC> {
   pub fn try_map<NS2, ZC2, E:Error,
                  F: FnOnce(NS) -> Result<NS2,E>,
                  G: FnOnce(ZC) -> Result<ZC2,E>
-                 // xxx should be a function for mapping pos
                  > (self, f:F, g:G) -> Result<PieceUpdateOp<NS2,ZC2>,E>
   {
     use PieceUpdateOp::*;