Fix error by linter

decode.go

@@ -70,6 +70,7 @@ func unmarshalNoEscape(data []byte, v interface{}) error {
 	return nil
 }
 
+//nolint:staticcheck
 //go:nosplit
 func noescape(p unsafe.Pointer) unsafe.Pointer {
 	x := uintptr(p)

rtype.go

@@ -244,12 +244,6 @@ func (t *rtype) Out(i int) reflect.Type {
 	return rtype_Out(t, i)
 }
 
-//go:linkname rtype_escape reflect.(*rtype).Kind
-func rtype_escape(*rtype) reflect.Kind
-func (t *rtype) escape() {
-	rtype_escape(t)
-}
-
 //go:linkname rtype2type reflect.toType
 //go:noescape
 func rtype2type(t *rtype) reflect.Type