godash: remove assigned but unused start var

Change-Id: I4c99ca26d7a6a5d4941fb764937f54bdd6cd5b99
Reviewed-on: https://go-review.googlesource.com/34974
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
1 file changed