go: cleanup old build flags

Signed-off-by: Stephan Renatus <stephan.renatus@gmail.com>

bundle/filefs.go

@@ -1,6 +1,3 @@
-//go:build go1.16
-// +build go1.16
-
 package bundle
 
 import (

capabilities/capabilities.go

@@ -2,9 +2,6 @@
 // Use of this source code is governed by an Apache2
 // license that can be found in the LICENSE file.
 
-//go:build go1.16
-// +build go1.16
-
 package capabilities
 
 import (

v1/bundle/filefs.go

@@ -1,6 +1,3 @@
-//go:build go1.16
-// +build go1.16
-
 package bundle
 
 import (

v1/bundle/filefs_test.go

@@ -1,6 +1,3 @@
-//go:build go1.16
-// +build go1.16
-
 package bundle
 
 import (

v1/capabilities/capabilities.go

@@ -2,9 +2,6 @@
 // Use of this source code is governed by an Apache2
 // license that can be found in the LICENSE file.
 
-//go:build go1.16
-// +build go1.16
-
 package capabilities
 
 import (

v1/capabilities/capabilities_test.go

@@ -2,9 +2,6 @@
 // Use of this source code is governed by an Apache2
 // license that can be found in the LICENSE file.
 
-//go:build go1.16
-// +build go1.16
-
 package capabilities_test
 
 import (

v1/topdown/http_fixup.go

@@ -1,5 +1,4 @@
-//go:build !go1.18 || !darwin
-// +build !go1.18 !darwin
+//go:build !darwin
 
 package topdown
 

v1/topdown/http_fixup_darwin.go

@@ -1,6 +1,3 @@
-//go:build go1.18
-// +build go1.18
-
 package topdown
 
 func fixupDarwinGo118(x, y string) string {