Format the Lint struct non-weirdly [#3]

I thought it was a golang style convention to put a blank line between
public and private struct fields, but apparently I imagined that.

internal/run/lint.go

@@ -7,7 +7,6 @@ import (
 // Lint is an execution step that calls `helm lint` when executed.
 type Lint struct {
 	Chart string
-
 	cmd   cmd
 }