Remove example file and update copyright year to 2026

Copilot · hsluoyz · Copilot · commit c5c107fbd1f3 · 2026-01-25T08:40:11.000Z
Co-authored-by: hsluoyz &lt;3787410+hsluoyz@users.noreply.github.com&gt;
diff --git a/ai_api.go b/ai_api.go
@@ -1,4 +1,4 @@
-// Copyright 2017 The casbin Authors. All Rights Reserved.
+// Copyright 2026 The casbin Authors. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/ai_api_test.go b/ai_api_test.go
@@ -1,4 +1,4 @@
-// Copyright 2017 The casbin Authors. All Rights Reserved.
+// Copyright 2026 The casbin Authors. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/examples/explain_example.go b/examples/explain_example.go

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-// Copyright 2017 The casbin Authors. All Rights Reserved.`
	`1`	`+// Copyright 2026 The casbin Authors. All Rights Reserved.`
`2`	`2`	`//`
`3`	`3`	`// Licensed under the Apache License, Version 2.0 (the "License");`
`4`	`4`	`// you may not use this file except in compliance with the License.`