unicode: remove script test
unicode: remove script test

The script test requires a manual update on each new
Unicode release, which interupts the automated flow.
The test is removed in favor of one that fits within the
automated scripts.
See https://go-review.googlesource.com/c/text/+/169638.

Updates golang/go#27945

Change-Id: I9c9f1e2a77f7baef17040ea09eec28d7cf55b5e4
Reviewed-on: https://go-review.googlesource.com/c/go/+/169619
Reviewed-by: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>

akutz/go,josharian/go,CAFxX/go,nawawi/go,nawawi/go,akutz/go,josharian/go,CAFxX/go,nawawi/go,cloudflare/go,akutz/go,golang/go,CAFxX/go,CAFxX/go,cloudflare/go,CAFxX/go,josharian/go,golang/go,josharian/go,CAFxX/go,CAFxX/go,nawawi/go,akutz/go,akutz/go,nawawi/go,CAFxX/go,golang/go,cloudflare/go,golang/go,akutz/go,nawawi/go,cloudflare/go,golang/go,akutz/go,josharian/go,cloudflare/go,golang/go,josharian/go,josharian/go,cloudflare/go,golang/go,cloudflare/go,nawawi/go,cloudflare/go,josharian/go,golang/go,akutz/go,nawawi/go