diff --git a/sliceflag.go b/sliceflag.go
index 7dea3576a3..b2ca59041f 100644
--- a/sliceflag.go
+++ b/sliceflag.go
@@ -1,6 +1,3 @@
-//go:build go1.18
-// +build go1.18
-
 package cli
 
 import (
diff --git a/sliceflag_pre18.go b/sliceflag_pre18.go
deleted file mode 100644
index 1173ae7402..0000000000
--- a/sliceflag_pre18.go
+++ /dev/null
@@ -1,10 +0,0 @@
-//go:build !go1.18
-// +build !go1.18
-
-package cli
-
-import (
-	"flag"
-)
-
-func unwrapFlagValue(v flag.Value) flag.Value { return v }
diff --git a/sliceflag_test.go b/sliceflag_test.go
index 83374172c8..78dc5d509d 100644
--- a/sliceflag_test.go
+++ b/sliceflag_test.go
@@ -1,6 +1,3 @@
-//go:build go1.18
-// +build go1.18
-
 package cli
 
 import (