diff --git a/contrib/example.go b/contrib/example.go
deleted file mode 100644
index fb02931..0000000
--- a/contrib/example.go
+++ /dev/null
@@ -1,21 +0,0 @@
-package contrib
-
-import "context"
-
-func ok() {
-	ctx := context.Background()
-
-	for i := 0; i < 10; i++ {
-		ctx := context.WithValue(ctx, "key", i)
-		_ = ctx
-	}
-}
-
-func notOk() {
-	ctx := context.Background()
-
-	for i := 0; i < 10; i++ {
-		ctx = context.WithValue(ctx, "key", i) // "nested context in loop"
-		_ = ctx
-	}
-}