cmd/go/internal/mvs: remove useless type assertion

Change-Id: Ifdb351193cab1c0b905a1cde17993231f849644c
Reviewed-on: https://go-review.googlesource.com/c/go/+/436700
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

diff --git a/src/cmd/go/internal/mvs/mvs.go b/src/cmd/go/internal/mvs/mvs.go
index a1b51557a3519c63c117987e2523102ff92d914e..eb33ebd24b9457b8ef785d19388302be743cafd3 100644 (file)
--- a/src/cmd/go/internal/mvs/mvs.go
+++ b/src/cmd/go/internal/mvs/mvs.go
@@ -166,7 +166,7 @@ func buildList(targets []module.Version, reqs Reqs, upgrade func(module.Version)
                        }
                        return false
                }
-               return nil, NewBuildListError(err.(error), errPath, isUpgrade)
+               return nil, NewBuildListError(err, errPath, isUpgrade)
        }
 
        // The final list is the minimum version of each module found in the graph.