cmd/relui,internal/relui: cleanup go:build comments

These are no longer necessary as embed is in all supported verions of
Go.

For golang/go#47401

Change-Id: I3b128a28028d0ca15088d71202984c8b8ef4469c
Reviewed-on: https://go-review.googlesource.com/c/build/+/352569
Trust: Alexander Rakoczy <[email protected]>
Run-TryBot: Alexander Rakoczy <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Reviewed-by: Heschi Kreinick <[email protected]>

Author: toothrot

cmd/relui/main.go

@@ -2,9 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build go1.16
-// +build go1.16
-
 // relui is a web interface for managing the release process of Go.
 package main
 

internal/relui/content.go

@@ -2,9 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build go1.16
-// +build go1.16
-
 package relui
 
 import "embed"

internal/relui/store.go

@@ -2,9 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build go1.16
-// +build go1.16
-
 package relui
 
 import (

internal/relui/web.go

@@ -2,9 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build go1.16
-// +build go1.16
-
 package relui
 
 import (

internal/relui/web_test.go

@@ -2,9 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build go1.16
-// +build go1.16
-
 package relui
 
 import (