refactor: remove dead code

pkg/message/parser/writer_test.go

@@ -36,26 +36,6 @@ func TestParserWrite(t *testing.T) {
 	assert.Equal(t, s("text_html_octet_attachment.eml"), crlf(buf.String()))
 }
 
-func TestParserWriteNoAttachments(t *testing.T) {
-	p := newTestParser(t, "text_html_octet_attachment.eml")
-
-	w := p.
-		NewWriter().
-		WithCondition(func(p *Part) bool {
-			// We don't write if the content disposition says it's an attachment.
-			if disp, _, err := p.Header.ContentDisposition(); err == nil && disp == "attachment" {
-				return false
-			}
-
-			return true
-		})
-
-	buf := new(bytes.Buffer)
-
-	assert.NoError(t, w.Write(buf))
-	assert.Equal(t, s("text_html.eml"), crlf(buf.String()))
-}
-
 func crlf(s string) string {
 	return strings.ReplaceAll(s, "\r\n", "\n")
 }