all: go fix to remove old build tags
//go:build has been the preferred form since Go 1.17,
and we now require Go 1.19 or later, so `go fix` removes the old form.
Signed-off-by: Daniel Martí <mvdan@mvdan.cc>
Change-Id: I6ada4d12e6e12a8629b83061348cab39b414e36e
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/554283
Reviewed-by: Paul Jolly <paul@myitcv.io>
Unity-New-Result: CUE porcuepine <cue.porcuepine@gmail.com>
TryBot-Result: CUEcueckoo <cueckoo+gerrithub@cuelang.org>