image/png: delete unused statement

Change-Id: I91378d5d5ecc1fc6741127a3924c631904da736b
Reviewed-on: https://go-review.googlesource.com/c/164199
Run-TryBot: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

diff --git a/src/image/png/writer.go b/src/image/png/writer.go
index c03335120eb273c813fab767a6ff506603558df2..2bd4fde692c3cabc5dd5de3d1157597072b74f5a 100644 (file)
--- a/src/image/png/writer.go
+++ b/src/image/png/writer.go
@@ -288,7 +288,6 @@ func filter(cr *[nFilter][]byte, pr []byte, bpp int) int {
                }
        }
        if sum < best {
-               best = sum
                filter = ftAverage
        }